<PAGE>
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
 
                               FORM 10-K/A NO. 1
 
                            UNITED STATE SECURITIES
                            AND EXCHANGE COMMISSION
 
                             WASHINGTON, D.C. 20549
 
                            ------------------------
 
  /X/    ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 1998
                                    OR
  / /    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
         SECURITIES EXCHANGE ACT OF 1934 (NO FEE REQUIRED) FOR THE
         TRANSITION PERIOD FROM TO
 
                          COMMISSION FILE NO. 0-21426
 
                            ------------------------
 
                              CASINO DATA SYSTEMS
             (Exact name of registrant as specified in its charter)
 
                   NEVADA                              88-0261839
      (State or other jurisdiction of        (I.R.S. Employer Identification
       incorporation or organization)                     No.)
 
            3300 BIRTCHER DRIVE
             LAS VEGAS, NEVADA                            89118
  (Address of principal executive offices)             (Zip Code)
 
                                 (702) 269-5000
 
              (Registrant's telephone number, including area code)
 
        Securities registered pursuant to Section 12(b) of the Act: NONE
 
Securities registered pursuant to Section 12(g) of the Act: COMMON STOCK, NO PAR
                                     VALUE
 
                            ------------------------
 
    Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes /X/  No / /
 
    Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of the Registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. Yes /X/  No / /
 
    As of April 23, 1999, 18,065,897 shares of the Registrant's Common Stock
were outstanding. The aggregate market value of the Common Stock held by
non-affiliates of the Registrant on such date, based upon the last sale price of
the Common Stock as reported on the NASDAQ National Market on April 23, 1999,
was $46,319,749. For purposes of this computation, affiliates of the Registrant
are deemed only to be the Registrant's executive officers and directors.
 
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
<PAGE>
                                    PART III
 
ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
 
DIRECTORS AND EXECUTIVE OFFICERS
 
    The following persons currently serve the Company as executive officers
and/or members of its Board of Directors. Each director has consented to serve
an additional term, if elected at the Company's next annual meeting of
shareholders.
 
    STEVEN A. WEISS, age 36, founded the Company in June 1990 and served as the
Company's Chairman of the Board from June 1990 to August 1994, and from November
1994 to the present. Mr. Weiss has served as an executive officer of the Company
since its inception, including as Chief Executive Officer, and currently serves
as President of its Research and Development Division. Mr. Weiss designed the
prototype slot accounting and player tracking system that evolved into the
Company's OASIS information management system in 1991. Prior thereto, Mr. Weiss
was employed by Bally as a consultant for Bally's slot information system.
 
    PHIL E. BRYAN, age 59, has served as a director of the Company since April
1995. Mr. Bryan also served as Chief Executive Officer of the Company from April
1995 to April 1996. Mr. Bryan became the Chief Operating Officer, President and
a director of Boomtown, Inc. in April, 1996. Mr. Bryan has more than thirty
years' experience in the gaming industry, serving as President and Chief
Executive Officer of the Gold River Operating Corp. from January 1993 to
February 1995. Prior thereto, Mr. Bryan served as President of the Sands Hotel
and Casino in Las Vegas from January to April 1992 and as Chief Executive
Officer of the Peppermill Casino Resort in Reno, Nevada from August 1982 to
January 1992.
 
    LEE LEMAS, age 52, joined the Company as Chief Financial Officer in July
1998. Ms. Lemas is currently Chief Operating Officer, Chief Financial Officer
and Vice President of Finance. Prior to joining CDS in 1998 and beginning in
1997, Ms. Lemas served as the Director of Finance for O.R. Technology. From 1995
to 1997, Ms. Lemas served as Chief Financial Officer of Amdahl's Open Enterprise
Systems. From 1991 to 1995, Ms. Lemas served as Chief Financial Officer at nCUBE
where, for a period of six months, she was also acting Vice President of
Manufacturing.
 
    HOWARD W. YENKE, age 62, served the Company as Chief Executive Officer from
June 1998 to February 19, 1999, and has served as a Director since June 1998.
Prior to joining the Company, Mr. Yenke served as President and Chief Executive
Officer of Silent Systems, Inc., a private company providing thermal and
acoustic products to the personal computer industry, a position he began in
November 1997. From June 1996 to November 1997, Mr. Yenke served as President,
Chief Executive Officer and Director of Lanart Corporation, a privately held
company providing LAN connectivity solutions to the computer industry. Mr. Yenke
was also President and CEO of Enterprise Development Corporation of Palm Beach
County, a not-for-profit consulting services company, from November 1994 to
November 1996. During the same time period, Mr. Yenke was President, CEO and
Director of Technology Deployment Holdings Company, Inc., a for profit
investment firm. From May 1994 to October 1994, Mr. Yenke served as President,
CEO and Director of ARCO Computer Products Company, a privately held company
providing PC peripheral products to the computer industry. From 1989 to 1994,
Mr. Yenke was employed by Boca Research, Inc. in several capacities including
President and CEO. Prior thereto, Mr. Yenke was employed by IBM Corporation for
over 25 years in various executive and management positions. Mr. Yenke also sits
on the boards of directors of Checkmate Electronics, Inc., Access Solutions
International, Inc., and Communications Systems International.
 
    THOMAS E. GARDNER, age 61, is President of LJT Associates, a consulting firm
which provides strategic planning, financial and management services to
corporations and assists investors in late stage venture capital opportunities
and acquisitions, a position he has held since 1993. From 1990 to 1992, Mr.
Gardner was Director Treasury Management Information with BankBoston
Corporation. From 1979 to 1990 Mr. Gardner was Senior Vice President and a
member of the senior management committee with a predecessor bank, Rhode Island
Hospital Trust National Bank, and acted as head of Treasury and Chairman of the
Asset and Liability Management Committee. Mr. Gardner is Chairman of the Board
of Directors of Access Solutions International, Inc. and a Director of Mossberg
Industries, Inc.
<PAGE>
    JOHN F. (JACK) HARVEY, age 76, is an independent business consultant. He
served on the Board of Directors of Del Webb Corporation from 1988 to 1994. Mr.
Harvey was a lecturer and member of the Finance faculty for the College of
Business and Economics at the University of Nevada, Las Vegas from 1986 to 1992.
Prior to his retirement in 1986, Mr. Harvey was Senior Vice President,
Treasurer, Chief Financial Officer and a director of Summa Corporation
(currently The Howard Hughes Corporation).
 
COMPLIANCE WITH SECTION 16(A) OF THE SECURITIES EXCHANGE ACT OF 1934
 
    Section 16(a) of the Securities Exchange Act of 1934 requires the Company's
officers and directors, and persons who own more than ten percent of a
registered class of the Company's equity securities, to file reports of
ownership and changes in ownership with the Securities and Exchange Commission
and the Nasdaq National Market. Officers, directors and greater than ten percent
stockholders are required by SEC regulation to furnish the Company with copies
of all Section 16(a) forms they file. Based solely on review of the copies of
such forms furnished to the Company, or written representations that no Forms 5
were required, the Company believes that during the fiscal year ended December
31, 1998, all Section 16(a) filing requirements applicable to its officers,
directors and greater than ten-percent beneficial owners were satisfied.
 
ITEM 11. EXECUTIVE COMPENSATION
 
    The following table sets forth the cash and noncash compensation for each of
the last three fiscal years awarded to or earned by each executive officer of
the Company whose salary and bonus during the year ended December 31, 1998
exceeded $100,000, or would have exceeded $100,000 had they been employed by the
Company at the end of the fiscal year.
 
                                       2
<PAGE>
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                                                   LONG-
                                                                                                   TERM
                                                                                                  COMPEN-
                                                                    ANNUAL COMPENSATION           SATION
                                                             ---------------------------------    AWARDS
                                                                                    ALL OTHER   -----------
                                                                                     ANNUAL     SECURITIES     ALL OTHER
                                                  FISCAL      SALARY      BONUS      COMPEN-    UNDERLYING   COMPENSATION
NAME AND PRINCIPAL POSITION                        YEAR         ($)        ($)     SATION ($)    OPTIONS #        ($)
----------------------------------------------  -----------  ---------  ---------  -----------  -----------  -------------
<S>                                             <C>          <C>        <C>        <C>          <C>          <C>
 
Steven A. Weiss...............................        1998     300,000         --       9,600(1)    100,000
  Chairman of the Board                               1997     300,000         --       9,600(1)         --
                                                      1996     279,500         --       9,600(1)     52,750
 
Lee Lemas (2).................................        1998     147,913                  4,800(1)    150,000
  Chief Financial Officer
 
Howard Yenke (3)..............................        1998     146,154                  5,539(1)    250,000
 
Diana L. Bennett..............................        1998     200,000         --       9,600(1)    100,000
  President and Chief Operating Officer (4)           1997     200,000     45,000       9,600(1)     20,000
                                                      1996     160,778                  9,563(1)     55,000
 
Kenneth S. Hardesty...........................        1998      82,692         --                  285,000        36,000(6)
  Chief Executive Officer (5)                         1997      14,423         --
 
Michael Perez (7).............................        1998     171,538                              60,000
</TABLE>
 
------------------------
 
(1) Represents automobile allowances provided to the Company's executive
    officers.
 
(2) Ms. Lemas became an executive officer of the Company in July 1998.
 
(3) Mr. Yenke served as Chief Executive Officer from June 1998 to February 19,
    1999.
 
(4) Ms. Bennett served as the Company's President and Chief Operating Officer
    from January 1996 to February 1999.
 
(5) Mr. Hardesty served as the Company's Chief Executive Officer from December,
    1997 to May 15, 1998.
 
(6) Represents a rental expense of $6,000 and a relocation expense allowance in
    the amount of $30,000 paid pursuant to Mr. Hardesty's employment agreement
    with the Company.
 
(7) Mr. Perez served as Chief Financial Officer from January 13, 1998 to June
    1998.
 
                                       3
<PAGE>
                       OPTION GRANTS IN LAST FISCAL YEAR
 
    The following table summarizes information with respect to options granted
to the executive officers named in the Summary Compensation Table during the
last fiscal year.
 
<TABLE>
<CAPTION>
                                                                                                POTENTIAL REALIZABLE
                                                        INDIVIDUAL GRANTS                             VALUE OF
                                                  ------------------------------                ASSUMED ANNUAL RATES
                                                    PERCENTAGE                                           OF
                                                     OF TOTAL                                        STOCK PRICE
                                    NUMBER OF         OPTIONS                                       APPRECIATION
                                    SECURITIES      GRANTED TO      EXERCISE OR                  FOR OPTION TERM (2)
                                    UNDERLYING     EMPLOYEES IN     BASE PRICE     EXPIRATION   ---------------------
NAME                              OPTION GRANTED    FISCAL YEAR      ($/SHARE)        DATE       5% ($)     10% ($)
--------------------------------  --------------  ---------------  -------------  ------------  ---------  ----------
<S>                               <C>             <C>              <C>            <C>           <C>        <C>
 
Steven A. Weiss.................       100,000             8.5       $    1.81      10/26/2008    113,830     288,467
 
Lee Lemas.......................        50,000             4.3       $    3.00      03/09/2008     90,190     226,464
                                       100,000             8.5       $    1.53      10/09/2008     96,221     243,843
 
Howard Yenke....................       250,000            21.3       $    3.19      06/04/2008    501,543   1,271,010
 
Diana L. Bennett................       100,000             8.5       $    1.81      10/26/2008    113,830     288,467
 
Mike Perez (3)..................       100,000             8.5       $    3.13      01/13/2003     87,078     192,609
</TABLE>
 
------------------------
 
(1) All options were granted at a price equal to the fair market value of the
    Company's common stock on the date of grant.
 
(2) Amounts shown in these columns have been derived by multiplying the exercise
    price by the annual appreciation rate shown (compounded for the term of the
    options), multiplying the result by the number of shares covered by the
    options, and subtracting the aggregate exercise price of the options. The
    dollar amounts set forth under this heading are the result of calculations
    at the 5 percent and 10 percent rates set by the Securities and Exchange
    Commission, and therefore are not intended to forecast possible future
    appreciation, if any, of the Company's stock price.
 
(3) Mr. Perez left the Company in June 1998 and his options have expired.
 
                                       4
<PAGE>
              AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR AND
                         FISCAL YEAR-END OPTION VALUES
 
    The following table summarizes information with respect to options held by
the executive officers named in the Summary Compensation Table and the value of
the options held by such persons as of the end of the last fiscal year.
 
<TABLE>
<CAPTION>
                                                                                                  VALUE OF UNEXERCISED
                                                                                                        IN-THE-
                                                                     NUMBER OF UNEXERCISED      MONEY OPTIONS AT FY-END
                                     SHARES                          OPTIONS AT FY-END (#)                ($)
                                   ACQUIRED ON         VALUE       --------------------------  --------------------------
NAME                              EXERCISE (#)     REALIZED ($)    EXERCISABLE  UNEXERCISABLE  EXERCISABLE  UNEXERCISABLE
-------------------------------  ---------------  ---------------  -----------  -------------  -----------  -------------
<S>                              <C>              <C>              <C>          <C>            <C>          <C>
 
Steven A. Weiss................        --               --            135,812        109,750            0    $    19,000
 
Lee Lemas......................        --               --             12,500        137,500    $       0    $    47,000
 
Howard Yenke...................        --               --                  0        250,000            0              0
 
Diana L. Bennett...............        --               --             29,167        145,833            0         19,000
 
Kenneth S. Hardesty............        --               --                  0              0            0              0
 
Mike Perez.....................        --               --                  0              0            0              0
</TABLE>
 
EMPLOYMENT AGREEMENTS
 
    The Company entered into an employment agreement with Mr. Weiss that expires
on December 31, 1999, and is terminable by the Company or Mr. Weiss upon notice.
The agreement provides for an annual base salary of $300,000. Mr. Weiss is
subject to certain non-competition provisions during the term of the employment
agreement and for two years thereafter, unless the employment agreement is
terminated by the Company or Mr. Weiss under certain circumstances, including in
the event of a change in control of the Company.
 
    The Company entered into an employment agreement with Ms. Lemas that expires
on December 31, 1999, and is terminable by the Company or Ms. Lemas upon notice.
The agreement provides for an annual salary of $215,000. Ms. Lemas is subject to
certain non-competition provisions during the term of the employment agreement
and for one year thereafter, unless the agreement is terminated by the Company
or Ms. Lemas under certain circumstances, including in the event of a change in
control of the Company.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
    The Company's Compensation Committee consists of Messrs. Thomas E. Gardner
and Phil E. Bryan.
 
DIRECTOR COMPENSATION
 
    Directors who are not also employees of the Company receive a $25,000 annual
director's fee and are reimbursed for costs and expenses they incur to attend
board meetings. Directors who are not also employees of the Company are entitled
to participate in the Company's 1994 Non-employee Director Stock Option Plan.
This plan is a formula stock option plan that provides for the initial grant of
a stock option covering 11,250 shares upon a person joining the Board and an
annual stock option grant covering 5,625 shares at each annual meeting of
shareholders. Each option granted has a ten-year term, vests equally over a two
year period and has an exercise price equal to the fair market value on the date
of grant.
 
COMPENSATION COMMITTEE REPORT ON EXECUTIVE COMPENSATION
 
    Decisions on compensation of the Company's executives generally have been
made by the Compensation and Stock Option Committee (the "Compensation
Committee") of the Board. Each member of the Compensation Committee is a
non-employee director. All decisions by the Compensation Committee
 
                                       5
<PAGE>
relating to the compensation of the Company's executive officers are reviewed by
the full Board. Each executive officer who also serves as a director of the
Company abstains from the discussion and vote relating to his or her
compensation. Pursuant to rules designed to enhance disclosure of the Company's
policies toward executive compensation, set forth below is a report prepared by
the Compensation Committee addressing the Company's compensation policies for
the year ended December 31, 1997 as they affected the Company's executive
officers. The following report of the Compensation Committee, as well as the
Performance Graph set forth herein, are not soliciting materials, are not deemed
filed with the Securities and Exchange Commission (the "SEC") and are not
incorporated by reference in any filing of the Company under the Securities Act
of 1933, as amended, or the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), whether made before or after the date of this Proxy Statement
and irrespective of any general incorporation language in any such filing.
 
    The Compensation Committee's executive compensation policies are designed to
provide competitive levels of compensation that integrate pay with the Company's
annual objectives and long-term goals, reward above-average corporate
performance, recognize individual initiative and achievements, and assist the
Company in attracting and retaining qualified executives. The Compensation
Committee intends to set executive compensation at levels that the Compensation
Committee believes to be consistent with others in the Company's industry.
 
    There are three elements in the Company's executive compensation program,
all determined by individual and corporate performance.
 
      Base salary compensation
     Annual incentive compensation
     Stock options
 
    Base salary compensation and increases are determined by the potential
effect the individual has on the Company, the skills and experiences required by
the job, and the performance and potential of the incumbent in the job.
 
    Effective in April 1996, the Compensation Committee instituted a bonus
incentive compensation plan which allows each executive to earn a percentage of
such executive's salary (up to 50%), payable quarterly, dependent upon the
Company's earnings performance for such fiscal year.
 
    Awards of stock grants under the Company's 1993 Stock Option and
Compensation Plan (the "Plan") are designed to promote the identity of long-term
interests between the Company's executives and its stockholders, and assist in
the retention of executives. The Plan also permits the Committee to grant stock
options to key personnel. Options become exercisable based upon criteria
established by the Company.
 
    While the value realizable from exercisable options is dependent upon the
extent to which the Company's performance is reflected in the market price of
the Company's common stock at any particular point in time, the decision as to
whether such value will be realized in any particular year is determined by each
individual executive and not by the Compensation Committee. Accordingly, when
the Committee recommends that an option be granted to an executive, that
recommendation does not take into account any gains realized that year by that
executive as a result of his or her individual decision to exercise an option
granted in a previous year.
 
    The Compensation Committee does not anticipate that any of the compensation
payable to executive officers of the Company in the coming year will exceed the
limits and deductibilities set forth in section 162(m) of the Internal Revenue
Code of 1986, as amended. The Compensation Committee has not established a
policy regarding compensation in excess of these limits, but will continue to
monitor this issue.
 
                 By the Compensation and Stock Option Committee
 
                                        THOMAS E. GARDNER
                                        PHIL E. BRYAN, JR.
 
                                       6
<PAGE>
                            STOCK PERFORMANCE GRAPH
 
    The Securities and Exchange Commission (the "SEC") requires that the Company
include in this Form 10-K/A a line-graph presentation comparing cumulative,
five-year return to the Company's stockholders (based on appreciation of the
market price of the Company's common stock) on an indexed basis with (i) a broad
equity market index and (ii) an appropriate published industry or
line-of-business index, or peer group index constructed by the Company. The
following presentation compares the Company's common stock price from December
31, 1993 to December 31, 1998, to the S&P 500 Stock Index and a "peer group"
index created by the Company over the same period. The "peer group" index that
the Company believes is representative of its industry includes Acres Gaming,
Inc., Alliance Gaming Corporation, Anchor Gaming, GTech Holdings Corp.,
International Game Technology, Shuffle Master, Inc., Powerhouse Technologies,
Inc. (formerly know as Video Lottery Technologies, Inc.), WMS Industries, and
Silicon Gaming, Inc.
 
    In the graph, the presentation assumes that the value of an investment in
each of the Company's common stock, the S&P 500 Index, and the two peer group
indices was $100 on December 31, 1993, and that any dividends paid were
reinvested in the same security.
 
EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC
 
<TABLE>
<CAPTION>
   TOTAL RETURN ANALYSIS
 
<S>                          <C>                   <C>           <C>
                              Casino Data Systems    Peer Group    S&P 500
12/31/1993                                $100.00       $100.00    $100.00
12/31/1994                                 $60.00        $61.51    $101.53
12/29/1995                                $142.86        $72.35    $139.69
12/30/1996                                 $58.93        $95.97    $171.82
12/31/1997                                 $24.64       $119.93    $229.13
12/31/1998                                 $17.14       $123.77    $293.74
</TABLE>
 
                                       7
<PAGE>
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
    The following table sets forth certain information regarding the beneficial
ownership of the Company's common stock as of the date hereof, by: (i) each
person known by the Company to be the beneficial owner of more than five percent
of its common stock, (ii) each director, (iii) each executive officer for whom
disclosure is required pursuant to Item 403 of Regulation S-K and (iv) all
executive officers and directors of the Company as a group.
 
<TABLE>
<CAPTION>
                                                                                             BENEFICIAL OWNERSHIP
                                                                                                      (1)
                                                                                            -----------------------
<S>                                                                                         <C>         <C>
NAME OF BENEFICIAL OWNER                                                                      NUMBER      PERCENT
------------------------------------------------------------------------------------------  ----------  -----------
 
Steven A. Weiss (2).......................................................................   2,913,967        16.0%
 
Lee Lemas (3).............................................................................      12,500           *
 
Howard Yenke..............................................................................       5,000           *
 
Phil E. Bryan (4).........................................................................      14,063           *
 
Thomas E. Gardner (5).....................................................................       6,625           *
 
John F. Harvey............................................................................       1,000           *
 
Franklin Resources, Inc. (6)..............................................................   1,575,000         8.7%
 
All current executive officers, directors and director nominees,
  as a group (6 persons) (7)..............................................................   3,015,655        16.5%
</TABLE>
 
------------------------
 
*   Less than one percent.
 
(1) Beneficial ownership is determined in accordance with rules of the
    Securities and Exchange Commission and includes generally voting power
    and/or investment power with respect to securities. Shares of the Company's
    common stock subject to options currently exercisable or exercisable within
    60 days of the date hereof, are deemed outstanding for computing the
    percentage ownership of the person holding such options but are not deemed
    outstanding for computing the percentage ownership of any other person.
    Except as otherwise indicated, the Company believes that the beneficial
    owners of the common stock listed above, based on information furnished by
    such owners, have sole investment and voting power with respect to such
    shares, subject to community property laws where applicable, and that there
    are no other affiliations among the stockholders listed in the table.
 
(2) The address of such person is 3300 Birtcher Drive, Las Vegas, Nevada 89118.
    Includes options to purchase 135,812 shares that are exercisable within 60
    days. Also includes 453,225 shares which are held by a trust for the benefit
    of Mr. Weiss' spouse and 353,024 shares which are held by a trust of which
    Mr. Weiss' spouse is one of the beneficiaries. Mr. Weiss disclaims
    beneficial ownership of these shares.
 
(3) Includes options to purchase 12,500 shares that are exercisable within 60
    days.
 
(4) Includes options to purchase 14,063 shares that are exercisable within 60
    days.
 
(5) Includes options to purchase 5,625 shares that are exercisable within 60
    days.
 
(6) Based on the most recent Schedule 13G filed with the Securities and Exchange
    Commission on January 26, 1999, on behalf of Franklin Resources, Inc., a
    holding company; Charles B. Johnson and Rupert H. Johnson, Jr., principal
    shareholders of the holding company; and Franklin Advisory Services, Inc.,
    an Investment Adviser. The address of such entity is 777 Mariners Island
    Boulevard, San Mateo, California 94404.
 
                                       8
<PAGE>
(7) Includes options to purchase 230,500 shares that are exercisable within 60
    days.
 
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
    (None).
 
                                    PART IV
 
ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K
 
<TABLE>
<S>           <C>
(a)(1)        These documents are listed in the Index to Consolidated Financial Statements
              and Supplementary Data in Item 8 of the Company's Form 10-K405.
 
(a)(2)        Schedules
 
              See Schedule attached.
 
(a)(3)        EXHIBITS
</TABLE>
 
<TABLE>
<CAPTION>
   EXHIBIT                                                  DESCRIPTION
-----------  ---------------------------------------------------------------------------------------------------------
<S>          <C>
 
       3.1   Articles of Incorporation, as amended (incorporated herein by reference to Exhibit 3.1 of the Company's
             Registration Statement on Form SB-2 (File No. 33-59148LA)).
 
       3.2   By-laws (incorporated herein by reference to Exhibit 3.2 of the Company's Registration Statement on Form
             SB-2 (File No. 33-59148LA)).
 
      10.1   1993 Employee Stock Option and Compensation Plan, as amended (incorporated herein by reference to Exhibit
             10.9 of the Company's Registration Statement on Form SB-2 (File No. 33-59148LA)).+
 
      10.2   1994 Non-Employee Director Option Plan (incorporated by reference to Exhibit A of the Registrant's Proxy
             Statement dated June 13, 1995).+
 
      10.3   Employment Agreement dated as of January 1, 1999 by and between the Company and Steven Weiss.+
 
      10.4   Employment Agreement dated as of January 27, 1997 between Diana L. Bennett and Casino Data Systems
             (incorporated by reference as Exhibit 10.5 to the Company's Form 10-K for the fiscal year ended December
             31, 1997).+
 
      10.5   Employment Agreement dated as of February 16, 1999 by and between the Company and Lee Lemas.+
 
        22   Subsidiaries of the Registrant.
 
      24.1   Consent of KPMG Peat Marwick LLP.*
 
        27   Financial Data Schedule*
</TABLE>
 
------------------------
 
+   Executive Compensatory Plan or Arrangement
 
*   Filed with the Company's Form 10-K for the fiscal year ended December 31,
    1998.
 
                                       9
<PAGE>
                                   SIGNATURES
 
    Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, Casino Data Systems has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized:
 
<TABLE>
<S>                             <C>  <C>
                                CASINO DATA SYSTEMS
 
                                                 /s/ LEE LEMAS
                                -------------------------------------
                                By:  Lee Lemas,
                                     Chief Operating Officer,
                                     Chief Financial Officer and
                                     Vice President--Finance
                                     (Principal Financial Officer)
 
                                Date: April 30, 1999
</TABLE>
 
                                       10