| Slot Machine |  Horizon Triple Play Poker | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Horse King III | 2003 | Unknown Korea |
| Slot Machine | In the Money | 2003 | Bally Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Independence Pay 2-Coin Multiplier | 2003 | Bally Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | It's All Greek to Me | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | It's My Party! | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Jackpot Safari | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Jackpot Smile | 2003 | Universal Co., Ltd Tokyo, Japan |
| Slot Machine | Jackpot Station | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Jazzy 7 | 2003 | Universal Co., Ltd Tokyo, Japan |
| Slot Machine | Jeff Foxworthy - You Might Be a Redneck If | 2003 | Aristocrat Leisure Industries Pty, Ltd. |
| Slot Machine | Jockey Star III | 2003 | Unknown Korea |
| Slot Machine | Jockey Star IV | 2003 | Unknown Korea |
| Slot Machine | Jockey Star VI | 2003 | Unknown Korea |
| Slot Machine | Joker 21 | 2003 | San Remo Games srl San Remo, IM, Italy |
| Slot Machine | Joker Fever - Dragon Deal Model RVN-BLX | 2003 | Dragon Co., Ltd. |
| Slot Machine | Joker Magic | 2003 | Sammy Corp. Japan |
| Slot Machine | Joy Pet | 2003 | Subsino Co., Ltd. |
| Slot Machine | Jumpin' Jack | 2003 | Bally Wulff |
| Slot Machine | Jungle | 2003 | Subsino Co., Ltd. |
| Slot Machine | Kaboom | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Kaleidoscope | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Kenosaurus Keno | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Keystone Cash | 2003 | GTech Corp. Providence, RI, USA |
| Slot Machine | Kickin' Keno | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | King Cash 3-Reel | 2003 | Barcrest USA IGT Group USA |
| Slot Machine | King Cash 5-Reel | 2003 | Barcrest USA IGT Group USA |
| Slot Machine | King Classic SL | 2003 | Bally Wulff |
| Slot Machine | King of the Sea | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Kingdom of Zeus Model ES143 | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Knight Moves | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Krazy Kops | 2003 | Bally Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Lemon Lime Twist | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | Lifestyles of the Rich and Famous | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Lightning $ - Double Strike | 2003 | Rocket Gaming Systems |
| Slot Machine | Limbo | 2003 | Bally Wulff |
| Slot Machine | Livin' Large | 2003 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | Lost Legend | 2003 | Cretus |
| Slot Machine | Lucky 8 Line | 2003 | Andamiro Co., Ltd. |
| Slot Machine | Lucky Four Leaf Clover | 2003 | IGT International Game Technologies Reno, NV, USA |
