| Unlight (2010) | 725,025 | 1,136 |
| Unlighted (2025) | 2,277 | 7 |
| Unlikely Heroes (2021) | 1,688,038 | 127 |
| Unlimited Saga (2002) | 1,499,589 | 1,527 |
| Unlimited Warriors (1996) | 16,491 | 8 |
| Unlinked Mask (2024) | 2,492 | 11 |
| The Unliving (2021) | 1,287,252 | 422 |
| The Unliving (2022) | 1,432,187 | 351 |
| Unluckily in Love (2023) | 124 | 3 |
| Unlucky Seven (2019) | 37,154 | 83 |
| Unmanned helicopter (2018) | 1,070 | 2 |
| Unmechanical (2012) | 2,462,530 | 1,055 |
| Unmemory (2020) | 209,810 | 57 |
| UnMetal (2021) | 17,782,273 | 6,754 |
| Unmurk (2023) | 96 | 4 |
| Unnamed Experiment (2024) | 829 | 5 |
| Unnatural (2018) | 2,792,349 | 218 |
| Unnatural Investigations (2022) | 28,473 | 42 |
| Unnatural: Benighted (2023) | 16,064 | 152 |
| Unnecessary Roughness '95 (1994) | 25,603 | 25 |
| Uno (1999) | 34,674,400 | 445 |
| Uno (2006) | 569,876 | 148 |
| Uno (2008) | 101,821,190 | 736 |
| Uno / Skip-Bo / Uno Freefall (2007) | 207,660 | 12 |
| Uno 52 (2006) | 19,030 | 44 |
| Uno Free Fall (2006) | 41,970 | 41 |
| Uno Rush (2009) | 5,120,870 | 34 |
| Uno With Friends (2019) | 7,553,756 | 1,546 |
| Unoffensible (2025) | 27 | 2 |
| Unou no Tatsujin: Hirameki Kosodate My Angel (2006) | 5,740 | 3 |
| Unpacking (2021) | 71,008,609 | 17,806 |
| Unpleasant Horse (2011) | 41,879 | 4 |
| UNPLUG - The Game (2025) | 741 | 10 |
| Unplugged (2021) | 16,798,538 | 1,265 |
| Unrailed! (2019) | 75,341,513 | 13,354 |
| Unravel (2016) | 104,848,633 | 25,322 |
| Unravel Two (2018) | 50,308,141 | 19,784 |
| Unravel: Yarny Bundle (2018) | 21,161 | 58 |
| Unreachable (2025) | 892,145 | 149 |
| Unread Messages (2024) | 13,204 | 14 |
| Unreal (1990) | 188,911 | 58 |
| Unreal (1998) | 177,237,039 | 25,502 |
| Unreal Championship (2002) | 830,056 | 473 |
| Unreal Championship 2 (2005) | 389,003 | 769 |
| Unreal Element World (2022) | 4,566 | 9 |
| Unreal Heroes (2017) | 77,971 | 6 |
| Unreal II: The Awakening (2003) | 3,824,923 | 2,648 |
| Unreal Life (2020) | 3,926,786 | 4,623 |
| Unreal Lust Theory (2024) | 2,903 | 2 |
| Unreal Physics (2024) | 37,697 | 50 |
| Unreal Tournament (1999) | 54,040,934 | 24,573 |
| Unreal Tournament 2003 (2002) | 1,434,396 | 1,055 |
| Unreal Tournament 2004 (2004) | 14,687,253 | 15,079 |
| Unreal Tournament 3 (2007) | 19,165,992 | 11,082 |
| UnReal World (1992) | 3,898,791 | 1,100 |
| Unreal Wukong (2024) | 1 | 1 |
| Unrelaxing Quacks (2024) | 654 | 7 |
| Unrest (2014) | 1,617,583 | 276 |
| Unruly Heroes (2019) | 9,890,188 | 3,654 |
| UNRUSH (2022) | 93 | 4 |
| Unsacrifice (2022) | 1,562 | 6 |
| Unscripted (2020) | 46,752,722 | 1,388 |
| Unseen Diplomacy (2016) | 68,095 | 39 |
| The Unseen Fears: Body Thief (2017) | 28,129 | 93 |
| 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) | 33,150 | 70 |
| The Unseen Fears: Outlive (2017) | 41,041 | 85 |
| The Unseen Fears: Stories Untold (2019) | 40,234 | 72 |
| Unsighted (2021) | 2,467,874 | 2,649 |
| The Unsolved (1997) | 188,814,960 | 1,440 |
| Unsolved Case: Above the Law (2023) | 28,714 | 146 |
| Unsolved Case: Fatal Clue (2022) | 106,656 | 138 |
| Unsolved Case: Killer Popularity (2024) | 31,894 | 106 |
| Unsolved Case: Murderous Script (2023) | 384,570 | 188 |
