| UNPLUG - The Game (2025) | 741 | 10 |
| Unplugged (2021) | 16,820,545 | 1,304 |
| Unrailed 2: Back on Track (2024) | 9,808 | 4 |
| Unrailed! (2019) | 75,796,318 | 13,531 |
| Unravel (2016) | 104,850,156 | 25,323 |
| Unravel Two (2018) | 50,337,443 | 19,900 |
| Unravel: Yarny Bundle (2018) | 21,161 | 58 |
| Unreachable (2025) | 967,557 | 157 |
| Unread Messages (2024) | 13,283 | 17 |
| Unreal (1990) | 189,139 | 58 |
| Unreal (1998) | 179,547,961 | 25,541 |
| Unreal Championship (2002) | 836,574 | 480 |
| Unreal Championship 2 (2005) | 415,570 | 779 |
| Unreal Element World (2022) | 4,566 | 9 |
| Unreal Heroes (2017) | 81,292 | 6 |
| Unreal II: The Awakening (2003) | 3,996,813 | 2,700 |
| Unreal Life (2020) | 3,930,912 | 4,632 |
| Unreal Lust Theory (2024) | 2,903 | 2 |
| Unreal Physics (2024) | 40,592 | 51 |
| Unreal Tournament (1999) | 55,559,231 | 24,837 |
| Unreal Tournament 2003 (2002) | 1,440,975 | 1,063 |
| Unreal Tournament 2004 (2004) | 14,979,034 | 15,675 |
| Unreal Tournament 3 (2007) | 19,268,240 | 11,137 |
| UnReal World (1992) | 3,899,084 | 1,099 |
| Unreal Wukong (2024) | 1 | 1 |
| Unreal Zombies (2025) | 0 | 0 |
| Unrelaxing Quacks (2024) | 654 | 7 |
| Unrest (2014) | 1,618,567 | 278 |
| Unruly Heroes (2019) | 9,892,355 | 3,658 |
| UNRUSH (2022) | 93 | 4 |
| Unsacrifice (2022) | 1,562 | 6 |
| Unscripted (2020) | 46,830,149 | 1,505 |
| Unseen Diplomacy (2016) | 68,523 | 43 |
| The Unseen Fears: Body Thief (2017) | 28,444 | 94 |
| The Unseen Fears: Fortune's Consequence (2024) | 117,903 | 285 |
| The Unseen Fears: Last Dance (2018) | 42,932 | 68 |
| The Unseen Fears: Ominous Talent (2020) | 33,154 | 70 |
| The Unseen Fears: Outlive (2017) | 41,041 | 85 |
| The Unseen Fears: Stories Untold (2019) | 40,234 | 72 |
| Unsent (2025) | 0 | 0 |
| Unserious Sandbox (2025) | 0 | 0 |
| Unsighted (2021) | 2,480,589 | 2,661 |
| The Unsolved (1997) | 189,491,524 | 1,544 |
| Unsolved Case: Above the Law (2023) | 28,726 | 146 |
| Unsolved Case: Fatal Clue (2022) | 106,763 | 137 |
| Unsolved Case: Killer Popularity (2024) | 32,502 | 106 |
| Unsolved Case: Murderous Script (2023) | 391,209 | 190 |
| Unsolved Case: The Scarlet Hyacinth (2023) | 37,473 | 66 |
| Unsolved Crimes (2008) | 463,273 | 38 |
| Unsouled (2022) | 735,411 | 349 |
| The Unspoken (2016) | 37,393,874 | 983 |
| Unspottable (2020) | 17,796,587 | 744 |
| Unstable Cylinder (2024) | 102 | 3 |
| Unstoppable Fist (2012) | 18,007 | 7 |
| Unstoppable Gorg (2012) | 529,457 | 149 |
| Unstrong: Space Calamity (2021) | 1,959 | 25 |
| Unsung Heroes: The Golden Mask (2020) | 122,918 | 191 |
| Unsung Kingdom (2020) | 1,608 | 31 |
| Unsung Knight (2021) | 4,441 | 5 |
| Unsung Story (2020) | 676,109 | 44 |
| Unsung Warriors (2022) | 2,619,313 | 346 |
| Unsupervised (2024) | 288,396 | 64 |
| Untale: King of Revinia (2020) | 5,109 | 38 |
| Untamed Isles (2022) | 570,173 | 63 |
| Untamed Tactics (2023) | 105,285 | 206 |
| Untamed: Life Of A Cougar (2015) | 429,520 | 71 |
| Unterholz (2024) | 15,219 | 13 |
| Untethered (2026) | 22,846 | 14 |
| Until Dawn (2015) | 1,538,659,273 | 172,997 |
| Until Dawn: Rush of Blood (2016) | 63,610,456 | 4,813 |
| Until I Have You (2016) | 22,564 | 77 |
| Until Last Breath (2020) | 11,750 | 15 |
| Until Last Tomorrow (2023) | 310 | 2 |
| Until Lights Out (2022) | 20,665 | 24 |
| Until Oblivion (2024) | 2,082 | 23 |
