**Exhibit21**

| 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                                 |
| Bally  Technologies India Private Limited                                               |       | India                                  |
| 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                                  |
| 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 limitedminority interest holder. For further information see Item 1― “Business —Casino Operations.”

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