| | Ultimate Challenge (Maygay) (M1A/B) | 1969 | Maygay | m1ultchl | | 0.00 |
 | Ultimate Ecology (Japan 931203) (clone of: ecofghtr) | 1993 | Capcom | uecology | Shooter / Flying Horizontal | 0.00 |
| | Ultimate Mortal Kombat 3 (rev 1.0) (clone of: umk3) | 1994 | Midway | umk3r10 | Fighter / Versus | 0.00 |
| | Ultimate Mortal Kombat 3 (rev 1.1) (clone of: umk3) | 1994 | Midway | umk3r11 | Fighter / Versus | 0.00 |
| | Ultimate Mortal Kombat 3 (rev 1.2) | 1994 | Midway | umk3 | Fighter / Versus | 5.49 |
| | Ultimate Nudge (Summit Coin) | 1981 | Summit Coin | sm_ultng | | 0.00 |
 | Ultimate Tennis | 1993 | Art & Magic | ultennis | Sports / Tennis | 4.38 |
| Ultimate Tennis (v 1.4, Japan) (clone of: ultennis) | 1993 | Art & Magic (Banpresto license) | ultennisj | | 0.00 |
| | Ultimo (Barcrest) (MPU5) (set 1) | 1969 | Barcrest | m5ultimo | | 0.00 |
| | Ultimo (Barcrest) (MPU5) (set 2) (clone of: m5ultimo) | 1969 | Barcrest | m5ultimo03a | | 0.00 |
| | Ultimo (Barcrest) (MPU5) (set 3) (clone of: m5ultimo) | 1969 | Barcrest | m5ultimo04 | | 0.00 |
 | Ultra Balloon | 1996 | SunA | uballoon | Platform / Run Jump | 6.00 |
 | Ultra Maru-hi Mahjong (Japan) | 1993 | Apple | ultramhm | Tabletop / Mahjong *Mature* | 0.00 |
 | Ultra Tank | 1978 | Atari (Kee Games) | ultratnk | Shooter / Versus | 4.09 |
 | Ultra Toukon Densetsu (Japan) | 1993 | Banpresto / Tsuburaya Productions | utoukond | Fighter / 2.5D | 5.44 |
 | Ultra X Weapons / Ultra Keibitai | 1995 | Banpresto / Tsuburaya Productions | ultrax | Shooter / Flying Vertical | 8.14 |
 | Ultraman (Japan) | 1991 | Banpresto / Bandai | ultraman | Fighter / Versus | 6.41 |
 | Ultraman Club - Tatakae! Ultraman Kyoudai!! | 1992 | Banpresto / Tsuburaya Productions | umanclub | Shooter / Field | 7.50 |
| | Umi de Poker / Marine Paradise (Japan) | 1997 | World Station Co.,LTD | umipoker | | 0.00 |
 | Uncle Fester's Quest: The Addams Family (PlayChoice-10) | 1989 | Sunsoft (Nintendo of America license) | pc_ftqst | Maze / Shooter Large | 0.00 |
