| Game Name | System |
|---|
| Xena Warrior Princess (Bwb) (MPU5) | MAME |
| Xenon | MAME |
| Xenon (Arcadia, V 2.3) | MAME |
| Xenon (French) | MAME |
| Xenophobe | MAME |
| Xerox 16/8 | MAME |
| Xerox 820 | MAME |
| Xerox 820-II | MAME |
| Xevios | MAME |
| Xevious (Atari) | MAME |
| Xevious (Atari, Namco PCB) | MAME |
| Xevious (Atari, harder) | MAME |
| Xevious (Namco) | MAME |
| Xevious 3D/G (Japan, XV31/VER.A) | MAME |
| Xexex (ver AAA) | MAME |
| Xexex (ver EAA) | MAME |
| Xexex (ver JAA) | MAME |
| Xing Yun Man Guan (China, V651C) | MAME |
| Xor World (prototype) | MAME |
| Xpress (Pcp) (ACESYS1) | MAME |
| Xtra Cash Casino (Dutch) (Bellfruit) (Scorpion 4) | MAME |
| Xtreme Rally / Off Beat Racer! | MAME |
| Xtrial Racing (ver JAB) | MAME |
| Xybots (French, rev 3) | MAME |
| Xybots (German, rev 3) | MAME |
| Xybots (rev 0) | MAME |
| Xybots (rev 1) | MAME |
| Xybots (rev 2) | MAME |
| Xyonix | MAME |
| YC-64 (MSX1) | MAME |
| YIS-503 III R (Estonian) (MSX2) | MAME |
| YIS-503 III R (Russian) (MSX2) | MAME |
| YIS303 (MSX1) | MAME |
| YIS503 (MSX1) | MAME |
| YIS503F (MSX1) | MAME |
| YIS503II (MSX1) | MAME |
| YIS503IIR (Estonian) (MSX1) | MAME |
| YIS503IIR (Russian) (MSX1) | MAME |
| YIS503M (MSX1) | MAME |
| YIS604 (128KB) (MSX2) | MAME |
| YIS604 (64KB) (MSX2) | MAME |
| YIS805/128 (Russian) (MSX2) | MAME |
| YIS805/256 (Russian) (MSX2) | MAME |
| YIS805R2/128 (Estonian) (MSX2) | MAME |
| YIS805R2/128 (Russian) (MSX2) | MAME |
| Yabba-Dabba-Dough (Qps) (set 1) | MAME |
| Yabba-Dabba-Dough (Qps) (set 2) | MAME |
| Yachtsman | MAME |
| Yakyuu Kakutou League-Man (Japan) | MAME |
| Yam! Yam!? | MAME |
| Yam! Yam!? (Korea) | MAME |
| Yamato (US) | MAME |
| Yamato (World?) | MAME |
| Yankee DO! | MAME |
| Yellow Cab (Japan) | MAME |
| Yellow Cab (bootleg) | MAME |
| Yes/No Sinri Tokimeki Chart | MAME |
| Yie Ar Kung-Fu (GX361 conversion) | MAME |
| Yie Ar Kung-Fu (program code G) | MAME |
| Yie Ar Kung-Fu (program code I) | MAME |
| Ying Hua Lian 2.0 (China, Ver. 1.02) | MAME |
| Yo! Noid (PlayChoice-10) | MAME |
| Yokai Douchuuki (Japan, new version (YD2, Rev B)) | MAME |
| Yokai Douchuuki (Japan, old version (YD1)) | MAME |
| Yori Jori Kuk Kuk | MAME |
| Yosaku To Donbei (set 1) | MAME |
| Yosaku To Donbei (set 2) | MAME |
| You Might Be A Redneck If... - Jeff Foxworthy (0351068, US) | MAME |
| Youjyuden (Japan) | MAME |
| Youma Ninpou Chou (Game Electronics bootleg, set 1) | MAME |
| Youma Ninpou Chou (Game Electronics bootleg, set 2) | MAME |
| Youma Ninpou Chou (Japan) | MAME |
| Youma Ninpou Chou (Japan, alt) | MAME |
| Your Lucky Knight (JPM) (IMPACT) (set 1) | MAME |
| Your Lucky Knight (JPM) (IMPACT) (set 2) | MAME |
| Your Lucky Knight (JPM) (IMPACT) (set 3) | MAME |
| Your Lucky Knight (JPM) (IMPACT) (set 4) | MAME |
| Your Lucky Knight (JPM) (IMPACT) (set 5) | MAME |
| Your Lucky Knight (JPM) (IMPACT) (set 6) | MAME |
| Yu-Jan | MAME |
| Yu-Ka | MAME |
| Yukiwo (World, prototype) | MAME |
| Yukon (version 1.0) | MAME |
| Yukon (version 2.0) | MAME |
| Yukon Gold (03J00191, NSW/ACT) | MAME |
| Yukon Gold (Russian) | MAME |
| Yumefuda [BET] | MAME |
| Yuuyu no Quiz de GO!GO! (Japan) | MAME |
| Z-100 | MAME |
| Z1013 (K7652/S6009) | MAME |
| Z1013 (K7659) | MAME |
| Z1013 (K7669) | MAME |
| Z1013 (matrix 8x4) | MAME |
| Z1013 (matrix 8x8) | MAME |
| Z80 TV Game System | MAME |
| Z80 dev board | MAME |
| Z80NE | MAME |
| Z80NE + LX.388 | MAME |
| Z80NE + LX.388 + Basic 16k | MAME |
| Z80NE + LX.388 + LX.390 | MAME |
