 | Thunder Fox (US) (clone of: thundfox) | 1990 | Taito America Corporation | thundfoxu | | 0.00 |
| Thunder Fox (World) | 1990 | Taito Corporation Japan | thundfox | Platform / Fighter Scrolling | 7.50 |
 | ThunderForce AC | 1990 | Sega / Technosoft | tfrceac | Shooter / Flying Horizontal | 7.99 |
| ThunderForce AC (bootleg) (clone of: tfrceac) | 1990 | bootleg | tfrceacb | Shooter / Flying Horizontal | 0.00 |
| ThunderForce AC (Japan) (clone of: tfrceac) | 1990 | Sega / Technosoft | tfrceacj | Shooter / Flying Horizontal | 0.00 |
 | ThunderJaws | 1990 | Atari Games | thunderj | Shooter / Misc. Horizontal | 5.50 |
| | Title Fight | 1990 | Gottlieb | tfight | | 0.00 |
 | Toki (Datsu bootleg) (clone of: toki) | 1990 | bootleg (Datsu) | tokib | Platform / Shooter Scrolling | 0.00 |
 | Top Player's Golf (NGM-003)(NGH-003) | 1990 | SNK | tpgolf | Sports / Golf | 7.50 |
 | Trigon (Japan) (clone of: lgtnfght) | 1990 | Konami | trigon | Shooter / Flying Vertical | 0.00 |
 | Trog (prototype, rev 4.00 07/27/90) (clone of: trog) | 1990 | Midway | trogpa4 | | 0.00 |
| Trog (prototype, rev PA6-PAC 09/09/90) (clone of: trog) | 1990 | Midway | trogpa6 | Maze | 0.00 |
| Trog (rev LA3 02/14/91) (clone of: trog) | 1990 | Midway | trog3 | Maze | 0.00 |
| Trog (rev LA4 03/11/91) (clone of: trog) | 1990 | Midway | trog4 | | 0.00 |
| Trog (rev LA5 03/29/91) | 1990 | Midway | trog | Maze | 5.75 |
 | Two Crude (US) (clone of: cbuster) | 1990 | Data East USA | twocrude | Platform / Fighter Scrolling | 10.00 |
 | U.S. Navy (Japan 901012) (clone of: cawing) | 1990 | Capcom | cawingj | Shooter / Flying Horizontal | 0.00 |
 | US AAF Mustang (25th May. 1990 / Seoul Trading) (clone of: mustang) | 1990 | UPL (Seoul Trading license) | mustangs | Shooter / Flying Horizontal | 0.00 |
| US AAF Mustang (25th May. 1990) | 1990 | UPL | mustang | Shooter / Flying Horizontal | 7.77 |
| US AAF Mustang (bootleg) (clone of: mustang) | 1990 | bootleg | mustangb | Shooter / Flying Horizontal | 0.00 |
