| Unlinked Mask (2024) | 2,450 | 11 |
| The Unliving (2021) | 1,287,239 | 422 |
| The Unliving (2022) | 1,432,066 | 351 |
| Unluckily in Love (2023) | 120 | 3 |
| Unlucky Seven (2019) | 37,154 | 83 |
| Unmanned helicopter (2018) | 1,070 | 2 |
| Unmechanical (2012) | 2,462,452 | 1,055 |
| Unmemory (2020) | 209,810 | 57 |
| UnMetal (2021) | 17,724,919 | 6,612 |
| Unmurk (2023) | 96 | 4 |
| Unnamed Experiment (2024) | 829 | 5 |
| Unnatural (2018) | 2,792,214 | 218 |
| Unnatural Investigations (2022) | 28,473 | 42 |
| Unnatural: Benighted (2023) | 16,030 | 145 |
| Unnecessary Roughness '95 (1994) | 25,556 | 24 |
| Uno (1999) | 34,674,300 | 445 |
| Uno (2006) | 569,875 | 148 |
| Uno (2008) | 101,144,967 | 678 |
| Uno / Skip-Bo / Uno Freefall (2007) | 207,660 | 12 |
| Uno 52 (2006) | 18,693 | 44 |
| Uno Free Fall (2006) | 41,868 | 40 |
| Uno Rush (2009) | 5,120,796 | 33 |
| Uno With Friends (2019) | 7,452,790 | 1,520 |
| Unoffensible (2025) | 27 | 2 |
| Unou no Tatsujin: Hirameki Kosodate My Angel (2006) | 5,737 | 2 |
| Unpacking (2021) | 70,700,616 | 17,562 |
| Unpleasant Horse (2011) | 41,879 | 4 |
| UNPLUG - The Game (2025) | 741 | 9 |
| Unplugged (2021) | 16,763,905 | 1,218 |
| Unrailed! (2019) | 75,252,162 | 13,029 |
| Unravel (2016) | 104,811,219 | 25,151 |
| Unravel Two (2018) | 50,170,657 | 19,446 |
| Unravel: Yarny Bundle (2018) | 21,127 | 58 |
| Unreachable (2025) | 891,622 | 148 |
| Unread Messages (2024) | 13,132 | 11 |
| Unreal (1990) | 188,873 | 59 |
| Unreal (1998) | 176,760,505 | 25,379 |
| Unreal Championship (2002) | 824,007 | 464 |
| Unreal Championship 2 (2005) | 388,352 | 761 |
| Unreal Element World (2022) | 4,566 | 9 |
| Unreal Heroes (2017) | 72,477 | 6 |
| Unreal II: The Awakening (2003) | 3,664,793 | 2,560 |
| Unreal Life (2020) | 3,877,890 | 4,564 |
| Unreal Lust Theory (2024) | 2,903 | 2 |
| Unreal Physics (2024) | 37,253 | 48 |
| Unreal Tournament (1999) | 53,289,061 | 23,942 |
| Unreal Tournament 2003 (2002) | 1,425,169 | 1,033 |
| Unreal Tournament 2004 (2004) | 14,487,279 | 14,172 |
| Unreal Tournament 3 (2007) | 19,017,761 | 10,925 |
| UnReal World (1992) | 3,895,114 | 1,075 |
| Unreal Wukong (2024) | 1 | 1 |
| Unrelaxing Quacks (2024) | 654 | 7 |
| Unrest (2014) | 1,611,026 | 267 |
| Unruly Heroes (2019) | 9,886,340 | 3,574 |
| UNRUSH (2022) | 93 | 4 |
| Unsacrifice (2022) | 1,562 | 6 |
| Unscripted (2020) | 46,587,332 | 1,205 |
| Unseen Diplomacy (2016) | 38,447 | 33 |
| 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) | 33,146 | 70 |
| The Unseen Fears: Outlive (2017) | 41,041 | 85 |
| The Unseen Fears: Stories Untold (2019) | 40,234 | 72 |
| Unsighted (2021) | 2,269,455 | 2,571 |
| The Unsolved (1997) | 187,537,035 | 1,363 |
| Unsolved Case: Above the Law (2023) | 27,102 | 131 |
| Unsolved Case: Fatal Clue (2022) | 106,403 | 131 |
| Unsolved Case: Killer Popularity (2024) | 31,109 | 104 |
| Unsolved Case: Murderous Script (2023) | 379,639 | 188 |
| Unsolved Case: The Scarlet Hyacinth (2023) | 32,280 | 65 |
| Unsolved Crimes (2008) | 449,280 | 33 |
| Unsouled (2022) | 734,212 | 348 |
| The Unspoken (2016) | 36,627,037 | 863 |
| Unspottable (2020) | 17,625,970 | 724 |
