| Xenoraptor (2014) | 59,986 | 82 |
| Xenos: Cartoon Creature Catcher (2024) | 14 | 2 |
| Xenosaga Episode I (2002) | 11,255,812 | 11,155 |
| Xenosaga Episode II (2004) | 4,047,832 | 4,735 |
| Xenosaga Episode III (2006) | 11,066,940 | 6,075 |
| Xenosaga Freaks (2004) | 17,295 | 18 |
| Xenosaga I & II (2006) | 604,692 | 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) | 56,518 | 38 |
| XENOTILT: HOSTILE PINBALL ACTION (2023) | 3,669 | 19 |
| XenoTown (2022) | 729 | 21 |
| Xenowars (2024) | 5,704 | 26 |
| Xenowerk (2015) | 1,773,768 | 2,020 |
| XenoWorld ~The Rondeau of Astra (2023) | 25 | 1 |
| Xenrai (2021) | 647 | 4 |
| Xentripetal Force (2019) | 0 | 0 |
| Xenus 2: White Gold (2008) | 3,788,124 | 1,012 |
| Xeodrifter (2014) | 1,102,621 | 1,025 |
| XERA: Survival (2021) | 3,879,171 | 1,742 |
| XEvil (1994) | 504 | 6 |
| Xevious (1982) | 4,752,281 | 1,865 |
| Xevious 3D/G (1996) | 738,033 | 165 |
| Xevious 3D/G+ (1997) | 122,467 | 116 |
| Xevious Arrangement (1995) | 198,822 | 45 |
| Xevious Resurrection (2009) | 84,777 | 9 |
| Xevious: Fardraut Densetsu (1990) | 3,321 | 18 |
| Xevious: Fardraut Saga (1988) | 137,522 | 72 |
| Xexex (1991) | 688,865 | 368 |
| Xexyz (1988) | 1,113,747 | 522 |
| XEYYEX (2019) | 64 | 5 |
| XF5700 Mantis Experimental Fighter (1992) | 12,421 | 7 |
| XGamer - AI revolution (2022) | 3,068 | 6 |
| XGIII: Extreme G Racing (2001) | 520,365 | 285 |
| XGRA: Extreme G Racing Association (2003) | 127,022 | 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) | 8,800 | 3 |
| Xiao Yi's strange world adventure (2022) | 0 | 0 |
| Xiaolin Showdown (2006) | 4,224,905 | 455 |
| XII Stag (2002) | 42,821 | 87 |
| XIII (2003) | 5,283,633 | 6,168 |
| XIII (2020) | 11,049,464 | 3,370 |
| 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) | 434 | 8 |
| 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) | 126,825 | 56 |
| Xonotic (2011) | 1,297,348 | 13,453 |
| XOR (1987) | 48,993 | 61 |
