| Slot Machine |  3-Bar-Any | 1964 | Bally Mfg. Co. Chicago, IL, USA |
| Slot Machine | 3-Coin Multiplier | 19?? | Aristocrat Leisure Industries Pty, Ltd. |
| Slot Machine | 3-For-1 | 1893 | Unknown |
| Slot Machine | 3-Hand Poker | 2002 | IGCA Innovative Gaming Corp. of America Las Vegas, NV, USA |
| Slot Machine | 3-Line Pay 1767-Way Model 831-Z | 1968 | Bally Mfg. Co. Chicago, IL, USA |
| Slot Machine | 3-Line Pay Fruit Model 831-F | 1968 | Bally Mfg. Co. Chicago, IL, USA |
| Slot Machine | 3-Line Pay Model 831-ZZSL | 1979 | Bally Mfg. Co. Chicago, IL, USA |
| Slot Machine | 3-Line Progressive Model 889 | 1970 | Bally Mfg. Co. Chicago, IL, USA |
| Slot Machine | 3-Way Action Poker | 200? | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | 3-Way Bonus Super Bell | 1946 | Keeney & Co., J.H. Chicago, IL, USA |
| Slot Machine | 3D Series - Drive In | 200? | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | 3G One Multistar | 2007 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | 3G Six Multistar | 2007 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | 3RV | 2001 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | 3RV | 2002 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | 3X Hot Hot 777 | 2006 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | 3x Pay Red White & Blue | 2006 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | 3x Triple Jackpot 9x 2-Coin Multiplier | 199? | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | 3x Triple Jackpot 9x Model 217B | 2000 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | 3X Wild Diamonds - Bingo | 202? | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | 3x2x Super Sevens | 2008 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | 3x2x Super Sevens - Free Games S3000 | 2014 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | 3x7 | 1988 | ADP Merkur GmbH Gauselmann Group Germany |
| Slot Machine | 3zone | 2009 | Nazionale Elettronica Giochi Italy |
| Slot Machine | 4 Barriles | 198? | Juegos Populares, S.A. |
| Slot Machine | 4 Bells | 1940 | Mills Novelty Co. Chicago, IL, USA |
| Slot Machine | 4 Bells | 1946 | Mills Industries, Inc. Chicago, IL, USA |
| Slot Machine | 4 Chinese Beasts | 2011 | Aruze Gaming America, Inc. Las Vegas, NV, USA |
| Slot Machine | 4 for 1 Roulette | 1930 | Caille Bros. Co., The Detroit, MI, USA |
| Slot Machine | 4 Jacks | 1930 | Field Paper Products Co. Peoria, IL, USA |
| Slot Machine | 4 Level Jacks or Better | 2005 | WMS Gaming, Inc. Chicago, IL, USA |
| Slot Machine | 4 Reels Drive | 19?? | Unknown |
| Slot Machine | 4 Up Bingo | 200? | Segasa Madrid, Spain |
| Slot Machine | 4-5 Bonus Poker | 2004 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | 4-Card Keno | 2008 | IGT International Game Technologies Reno, NV, USA |
| Slot Machine | 4-Reel Lightning Model 815-222 | 1967 | Bally Mfg. Co. Chicago, IL, USA |
| Slot Machine | 40 Super Hot | 200? | EGT Euro Games Technology, Ltd. Bulgaria |
| Slot Machine | 40 Super Hot deluxe | 2012 | EGT Euro Games Technology, Ltd. Bulgaria |
| Slot Machine | 40 Super Hot P-Series | 2011 | EGT Euro Games Technology, Ltd. Bulgaria |
| Slot Machine | 400 Series | 1973 | Jennings & Co., O.D. Chicago, IL, USA |
