**Exhibit 21**

| **Subsidiaries**                                                                     | ** ** | ** **     | ** ** | **State or Country  of Incorporation** |
|--------------------------------------------------------------------------------------|------------|----------------|------------|----------------------------------------|
| All subsidiaries are  wholly owned except as indicated.                              |       |           |
| Bally  Technologies, Inc.                                                       |       | Nevada         |
| Alliance Holding Company                                                             |       | Nevada         |
| Bally Gaming  International, Inc.                                               |       | Delaware       |
| Bally Gaming, Inc.                                                              |       | Nevada         |
| BGI Acquisition Company                                                              |       | France         |
| Bally Gaming and  Systems, SAS                                                       |       | France         |
| BGI Australia Pty.  Limited                                                          |       | Australia      |
| BGI Gaming &  Systems, S. DE R.L. DE C.V.                                   |       | Mexico         |
| Bally Gaming Africa  (Proprietary) Ltd.                                              |       | South Africa   |
| Bally Gaming de Puerto  Rico, Inc.                                              |       | Puerto Rico    |
| Bally Gaming and  Systems, S.A.                                                      |       | Uruguay        |
| Bally Gaming and Systems  UK Limited                                                 |       | United Kingdom |
| Crown Gaming Limited                                                                 |       | United Kingdom |
| Honeyframe Cashmaster  Limited                                                       |       | United Kingdom |
| Bally Gaming Hong Kong  Limited                                                      |       | Hong Kong      |
| Bally Gaming  International GmbH                                                     |       | Germany        |
| Bally Gaming Macau  Limited                                                          |       | Macau          |
| Bally Technologies India  Private Limited                                            |       | India          |
| CMS, LLC                                                                             |       | Mississippi    |
| Sierra Design Group                                                                  |       | Nevada         |
| Arcade Planet, Inc.                                                             |       | California     |
| Arcade Prizes, LLC                                                                   |       | Nevada         |
| Casino Electronics, Inc.                                                        |       | Nevada         |
| Foreign Gaming  Ventures, Inc.                                                  |       | Nevada         |
| United Gaming Rainbow                                                                |       | Nevada         |
| Rainbow Casino—Vicksburg Partnership, L.P. (a  Mississippi limited partnership) |       |           |

 

There is a limited minority interest holder. Forfurther information see Item 1— “Business—Casino Operations.”

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