| Xenonauts (2014) | 11,524,566 | 10,391 |
| Xenonauts 2 (2026) | 8,296,077 | 5,240 |
| Xenophage: Alien Bloodsport (1995) | 1,422,183 | 72 |
| Xenophobe (1987) | 580,104 | 329 |
| Xenopurge (2025) | 763 | 2 |
| Xenoraid: The First Space War (2016) | 448 | 3 |
| Xenoraptor (2014) | 59,986 | 82 |
| Xenos: Cartoon Creature Catcher (2024) | 14 | 2 |
| Xenosaga Episode I (2002) | 11,365,248 | 11,975 |
| Xenosaga Episode II (2004) | 4,082,820 | 5,209 |
| Xenosaga Episode III (2006) | 11,299,759 | 6,486 |
| Xenosaga Freaks (2004) | 18,418 | 19 |
| Xenosaga I & II (2006) | 611,300 | 110 |
| XenoShyft (2016) | 494,040 | 99 |
| Xenoslaive Overdrive (2017) | 3,432 | 14 |
| Xenostar (1994) | 2,421 | 3 |
| XenoTechArena (2025) | 0 | 0 |
| Xenoterrestrial (2023) | 60 | 3 |
| Xenotheria (2023) | 56,547 | 38 |
| XENOTILT: HOSTILE PINBALL ACTION (2023) | 4,026 | 22 |
| XenoTown (2022) | 729 | 21 |
| Xenowars (2024) | 5,704 | 26 |
| Xenowerk (2015) | 1,803,132 | 2,048 |
| XenoWorld ~The Rondeau of Astra (2023) | 25 | 1 |
| Xenrai (2021) | 647 | 4 |
| Xentripetal Force (2019) | 0 | 0 |
| Xenus 2: White Gold (2008) | 3,811,077 | 1,044 |
| Xeodrifter (2014) | 1,107,060 | 1,032 |
| XERA: Survival (2021) | 3,891,556 | 1,767 |
| XEvil (1994) | 504 | 6 |
| Xevious (1982) | 4,941,527 | 1,974 |
| Xevious 3D/G (1996) | 740,062 | 170 |
| Xevious 3D/G+ (1997) | 124,738 | 124 |
| Xevious Arrangement (1995) | 217,423 | 47 |
| Xevious Resurrection (2009) | 84,777 | 9 |
| Xevious: Fardraut Densetsu (1990) | 3,332 | 18 |
| Xevious: Fardraut Saga (1988) | 155,113 | 76 |
| Xexex (1991) | 710,349 | 426 |
| Xexyz (1988) | 1,119,397 | 545 |
| XEYYEX (2019) | 64 | 5 |
| XF5700 Mantis Experimental Fighter (1992) | 12,421 | 7 |
| XGamer - AI revolution (2022) | 3,068 | 6 |
| XGIII: Extreme G Racing (2001) | 526,495 | 310 |
| XGRA: Extreme G Racing Association (2003) | 127,069 | 172 |
| Xheres (2023) | 1,219 | 18 |
| Xiah (2003) | 3,838 | 4 |
| Xiao Ao Jiang Hu (1993) | 4,497 | 12 |
| Xiao Ao Jiang Hu 2: Wu Yue Jian Pai (2003) | 8,558 | 2 |
| Xiao Yi's strange world adventure (2022) | 0 | 0 |
| Xiaolin Showdown (2006) | 4,367,142 | 481 |
| XII Stag (2002) | 43,120 | 94 |
| XIII (2003) | 5,306,912 | 6,374 |
| XIII (2020) | 11,107,599 | 3,528 |
| XIIZEAL (2015) | 12,878 | 21 |
| Xing The Land Beyond (2017) | 39 | 1 |
| XING: The Land Beyond (2017) | 920,723 | 560 |
| Xio: Survival (2022) | 212,348 | 28 |
| Xion Leak (2025) | 495 | 9 |
| xiuzhen idle (2022) | 10,918 | 9 |
| Xmas Lemmings (1991) | 219,432 | 200 |
| XO Evolved (2022) | 34 | 2 |
| XO-Planets (2016) | 1,416 | 21 |
| xoEl Empire (2017) | 756 | 8 |
| XOL: Space Mech Wars (2025) | 0 | 0 |
