| Xenoraptor (2014) | 59,986 | 82 |
| Xenos: Cartoon Creature Catcher (2024) | 14 | 2 |
| Xenosaga Episode I (2002) | 11,300,102 | 11,320 |
| Xenosaga Episode II (2004) | 4,059,086 | 4,813 |
| Xenosaga Episode III (2006) | 11,077,920 | 6,121 |
| Xenosaga Freaks (2004) | 17,518 | 18 |
| Xenosaga I & II (2006) | 604,708 | 104 |
| XenoShyft (2016) | 494,025 | 99 |
| Xenoslaive Overdrive (2017) | 3,432 | 14 |
| Xenostar (1994) | 2,421 | 3 |
| XenoTechArena (2025) | 0 | 0 |
| Xenoterrestrial (2023) | 60 | 3 |
| Xenotheria (2023) | 56,534 | 38 |
| XENOTILT: HOSTILE PINBALL ACTION (2023) | 3,669 | 19 |
| XenoTown (2022) | 729 | 21 |
| Xenowars (2024) | 5,704 | 26 |
| Xenowerk (2015) | 1,802,177 | 2,031 |
| XenoWorld ~The Rondeau of Astra (2023) | 25 | 1 |
| Xenrai (2021) | 647 | 4 |
| Xentripetal Force (2019) | 0 | 0 |
| Xenus 2: White Gold (2008) | 3,794,691 | 1,013 |
| Xeodrifter (2014) | 1,102,654 | 1,026 |
| XERA: Survival (2021) | 3,880,579 | 1,745 |
| XEvil (1994) | 0 | 0 |
| Xevious (1982) | 4,773,774 | 1,892 |
| Xevious 3D/G (1996) | 738,472 | 166 |
| Xevious 3D/G+ (1997) | 122,635 | 118 |
| Xevious Arrangement (1995) | 198,822 | 45 |
| Xevious Resurrection (2009) | 84,777 | 9 |
| Xevious: Fardraut Densetsu (1990) | 3,322 | 18 |
| Xevious: Fardraut Saga (1988) | 139,791 | 73 |
| Xexex (1991) | 705,258 | 382 |
| Xexyz (1988) | 1,114,103 | 524 |
| XEYYEX (2019) | 64 | 5 |
| XF5700 Mantis Experimental Fighter (1992) | 12,421 | 7 |
| XGamer - AI revolution (2022) | 3,068 | 6 |
| XGIII: Extreme G Racing (2001) | 522,378 | 287 |
| XGRA: Extreme G Racing Association (2003) | 127,026 | 170 |
| Xheres (2023) | 1,219 | 18 |
| Xiah (2003) | 3,818 | 4 |
| Xiao Ao Jiang Hu (1993) | 4,221 | 11 |
| Xiao Ao Jiang Hu 2: Wu Yue Jian Pai (2003) | 0 | 0 |
| Xiao Yi's strange world adventure (2022) | 0 | 0 |
| Xiaolin Showdown (2006) | 4,227,154 | 460 |
| XII Stag (2002) | 43,025 | 92 |
| XIII (2003) | 5,297,142 | 6,236 |
| XIII (2020) | 11,080,117 | 3,412 |
| XIIZEAL (2015) | 12,875 | 19 |
| Xing The Land Beyond (2017) | 39 | 1 |
| XING: The Land Beyond (2017) | 920,704 | 560 |
| Xio: Survival (2022) | 212,348 | 28 |
| Xion Leak (2025) | 447 | 9 |
| xiuzhen idle (2022) | 10,918 | 9 |
| Xmas Lemmings (1991) | 219,241 | 199 |
| XO Evolved (2022) | 34 | 2 |
| XO-Planets (2016) | 1,416 | 21 |
| xoEl Empire (2017) | 756 | 8 |
| Xonix (1984) | 0 | 0 |
| Xonotic (2011) | 1,300,768 | 13,634 |
| XOR (1987) | 51,828 | 62 |
