| Slot Machine |  Carnival of Mystery | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Cash Cow | 2003 | Rocket Gaming Systems |
| Slot Machine | Cash Crate Bay | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Cash Crossing | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Cash Eruption | 2003 | GTech Corp. Providence, RI, USA |
| Slot Machine | Cash Inferno | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Cashball | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Cashsquatch | 2003 | GTech Corp. Providence, RI, USA |
| Slot Machine | Casino Win | 2003 | Bally Wulff |
| Slot Machine | Catch A Falling Star | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Cats and Dogs - Spin 'n' Hold | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Cheeky Pete Classics | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Cherry Blast | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Cherry Time Model CN9411-008 | 2003 | Dragon Co., Ltd. |
| Slot Machine | Cleopatra Bingo | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Conan | 2003 | Unknown Korea |
| Slot Machine | Copa King Model WMH-208CK | 2003 | Paokai Electronic Enterprise Co., Ltd. Taiwan |
| Slot Machine | Cops and Donuts | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Copy Cat | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Cowabunga | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Crazy Bugs Classic Blend Series | 2003 | EGT Euro Games Technology, Ltd. Bulgaria |
| Slot Machine | Crazy Diamonds Hot Hot Super Jackpot | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Crystal Tens | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Cupid | 2003 | Subsino Co., Ltd. |
| Slot Machine | Da Capo | 2003 | Panther |
| Slot Machine | Dashing Diamonds | 2003 | Cadillac Jack Duluth, GA, USA |
| Slot Machine | Day Spa | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Days Off | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Dem Bones | 2003 | Aruze Corp. Japan |
| Slot Machine | Denver | 2003 | Mega |
| Slot Machine | Denver Duck and the Quest for the Golden Egg | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Diamond Bar | 2003 | Unknown Korea |
| Slot Machine | Diamond Bar V1 | 2003 | Unknown Korea |
| Slot Machine | Diamond Bar V2 | 2003 | Unknown Korea |
| Slot Machine | Diamond Bar V3 | 2003 | Unknown Korea |
| Slot Machine | Diamond Line Frenzy | 2003 | Bally Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Diamond Solitaire | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Diamonds in the Rough | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Dizzy Dough | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Dog and Bone | 2003 | GTech Corp. Providence, RI, USA |
