| UFO: Extraterrestrials (2007) | 546,919 | 745 |
| Ufouria: The Saga (1991) | 893,192 | 883 |
| Ugaris - The legend Recovered (2014) | 331 | 3 |
| Ugh! (1992) | 89,012,097 | 1,463 |
| The Ugly Ducling (2022) | 0 | 0 |
| The Ugly Prince Duckling (2007) | 5,656 | 20 |
| UglyDolls: An Imperfect Adventure (2019) | 379,999 | 104 |
| Ugougo Trinity (2009) | 0 | 0 |
| UK Truck Simulator (2010) | 2,819,429 | 331 |
| Ukhar (2018) | 1,310 | 6 |
| UKNON Jones & Guynelk - Awesome! (2023) | 86 | 1 |
| UKNON Jones & Guynelk 2 (2025) | 0 | 0 |
| Ukraine War Stories (2022) | 35,344 | 111 |
| Ulama: Arena of the Gods (2017) | 337 | 7 |
| Ulia Chronicles (2024) | 417 | 2 |
| Uligo: A Slime's Hike (2022) | 358 | 9 |
| Ulises (1989) | 94,948 | 60 |
| Ultima Adventum (2021) | 42 | 1 |
| Ultima Forever: Quest for the Avatar (2013) | 675,239 | 85 |
| Ultima I: The First Age of Darkness (1981) | 6,270,918 | 1,173 |
| Ultima II: The Revenge of the Enchantress (1982) | 2,572,025 | 570 |
| Ultima III: Exodus (1983) | 2,544,384 | 1,471 |
| Ultima IV: Quest of the Avatar (1985) | 3,334,188 | 2,585 |
| Ultima IX: Ascension (1999) | 4,368,965 | 2,305 |
| Ultima Online (1997) | 27,335,944 | 25,849 |
| Ultima Ratio Regum (2012) | 45,908 | 15 |
| Ultima Underworld II: Labyrinth of Worlds (1993) | 2,143,690 | 1,244 |
| Ultima Underworld: The Stygian Abyss (1992) | 5,511,381 | 2,206 |
| Ultima V: Warriors of Destiny (1988) | 1,918,658 | 1,613 |
| Ultima VI: The False Prophet (1990) | 2,983,289 | 1,985 |
| Ultima VII Part Two: Serpent Isle (1993) | 286,996 | 676 |
| Ultima VII: The Black Gate (1992) | 8,322,787 | 2,958 |
| Ultima VIII: Pagan (1994) | 2,357,627 | 1,218 |
| Ultima: Escape from Mt. Drash (1983) | 48,794 | 35 |
| Ultima: Runes of Virtue (1992) | 1,095,649 | 73 |
| Ultima: Runes of Virtue II (1993) | 65,808 | 147 |
| Ultima: Worlds of Adventure 2: Martian Dreams (1991) | 93,627 | 191 |
| The Ultimate 11: SNK Football Championship (1996) | 459,197 | 225 |
| Ultimate 8 Ball (1999) | 68,399 | 86 |
| Ultimate Admiral: Age of Sail (2021) | 3,800,233 | 1,868 |
| Ultimate Admiral: Dreadnoughts (2021) | 41,853,265 | 11,692 |
| Ultimate ADOM - Caverns of Chaos (2021) | 575,617 | 328 |
| Ultimate Air Combat (1992) | 80,725 | 114 |
| Ultimate Angler (2015) | 1,166,617 | 344 |
| Ultimate Anime Jigsaw Puzzle (2023) | 2,280 | 14 |
| Ultimate Arena (2016) | 3,221,085 | 435 |
| Ultimate Band (2008) | 262,469 | 218 |
| Ultimate Baseball Online (2003) | 11,252 | 6 |
| Ultimate Basketball (1990) | 2,245,975 | 349 |
| The Ultimate Battle of the Sexes (2010) | 2,261 | 24 |
| Ultimate Battle Zombies (2012) | 16,358 | 1 |
| Ultimate Beach Soccer (2003) | 2,329,659 | 86 |
| Ultimate Block Party (2004) | 30,150 | 36 |
| Ultimate Board Game Collection (2006) | 41,693 | 61 |
| Ultimate Body Blows (1994) | 57,282 | 51 |
| Ultimate Brain Games (2003) | 148,604 | 71 |
| Ultimate Card Games (2004) | 13,026 | 32 |
| Ultimate Chicken Horse (2016) | 1,175,242,867 | 32,040 |
| Ultimate Chump (2024) | 3 | 1 |
| Ultimate Civil War Battles: Robert E. Lee vs. Ulysses S. Grant (2003) | 260,725 | 4 |
| Ultimate Combat Mission (1987) | 2,632 | 13 |
| Ultimate Custom Night (2018) | 2,146,167,034 | 62,397 |
| Ultimate Danger Bundle (2018) | 40,601 | 3 |
| Ultimate Destruction Simulator (2023) | 82,972 | 19 |
| Ultimate Dinos World (2020) | 0 | 0 |
| Ultimate Domain (1993) | 68,579 | 50 |
| Ultimate Duck Hunting (2006) | 361,637 | 23 |
| Ultimate Epic Battle Simulator (2017) | 1,352,114,364 | 20,607 |
| Ultimate Epic Battle Simulator 2 (2023) | 353,467,096 | 61,971 |
| Ultimate Fight Survival (2021) | 3,735,327 | 2,416 |
| Ultimate Fighter (1992) | 4,112,879 | 502 |
| Ultimate Fighting Championship (2000) | 2,956,801 | 628 |
| Ultimate Fishing Simulator (2018) | 21,736,071 | 4,794 |
| Ultimate Fishing Simulator 2 (2021) | 3,076,449 | 1,508 |
| Ultimate Fishing Simulator VR (2019) | 107,458 | 8 |
