| Unlinked Mask (2024) | 0 | 0 |
| The Unliving (2021) | 0 | 0 |
| The Unliving (2022) | 1,432,047 | 351 |
| Unluckily in Love (2023) | 120 | 3 |
| Unlucky Seven (2019) | 0 | 0 |
| Unmanned helicopter (2018) | 1,070 | 2 |
| Unmechanical (2012) | 0 | 0 |
| Unmemory (2020) | 209,810 | 57 |
| UnMetal (2021) | 17,693,858 | 6,479 |
| Unmurk (2023) | 96 | 4 |
| Unnamed Experiment (2024) | 829 | 5 |
| Unnatural (2018) | 0 | 0 |
| Unnatural Investigations (2022) | 0 | 0 |
| Unnatural: Benighted (2023) | 14,381 | 142 |
| Unnecessary Roughness '95 (1994) | 25,540 | 24 |
| Uno (1999) | 34,674,176 | 445 |
| Uno (2006) | 0 | 0 |
| Uno (2008) | 0 | 0 |
| Uno / Skip-Bo / Uno Freefall (2007) | 207,660 | 12 |
| Uno 52 (2006) | 18,518 | 44 |
| Uno Free Fall (2006) | 0 | 0 |
| Uno Rush (2009) | 0 | 0 |
| Uno With Friends (2019) | 7,446,493 | 1,510 |
| Unoffensible (2025) | 27 | 2 |
| Unou no Tatsujin: Hirameki Kosodate My Angel (2006) | 5,737 | 2 |
| Unpacking (2021) | 70,583,478 | 17,361 |
| Unpleasant Horse (2011) | 0 | 0 |
| UNPLUG - The Game (2025) | 741 | 9 |
| Unplugged (2021) | 16,700,088 | 1,195 |
| Unrailed! (2019) | 74,970,404 | 12,848 |
| Unravel (2016) | 104,806,076 | 25,052 |
| Unravel Two (2018) | 50,036,077 | 19,292 |
| Unravel: Yarny Bundle (2018) | 20,804 | 58 |
| Unreachable (2025) | 0 | 0 |
| Unread Messages (2024) | 0 | 0 |
| Unreal (1990) | 188,872 | 59 |
| Unreal (1998) | 176,682,875 | 25,267 |
| Unreal Championship (2002) | 823,971 | 462 |
| Unreal Championship 2 (2005) | 387,823 | 749 |
| Unreal Element World (2022) | 4,566 | 9 |
| Unreal Heroes (2017) | 68,456 | 6 |
| Unreal II: The Awakening (2003) | 3,648,735 | 2,538 |
| Unreal Life (2020) | 3,874,348 | 4,543 |
| Unreal Lust Theory (2024) | 2,903 | 2 |
| Unreal Physics (2024) | 37,075 | 48 |
| Unreal Tournament (1999) | 52,950,573 | 23,641 |
| Unreal Tournament 2003 (2002) | 0 | 0 |
| Unreal Tournament 2004 (2004) | 14,415,388 | 13,777 |
| Unreal Tournament 3 (2007) | 18,735,127 | 10,860 |
| UnReal World (1992) | 0 | 0 |
| Unreal Wukong (2024) | 1 | 1 |
| Unrelaxing Quacks (2024) | 654 | 7 |
| Unrest (2014) | 0 | 0 |
| Unruly Heroes (2019) | 9,875,644 | 3,560 |
| UNRUSH (2022) | 93 | 4 |
| Unsacrifice (2022) | 1,562 | 6 |
| Unscripted (2020) | 46,528,765 | 1,130 |
| Unseen Diplomacy (2016) | 38,050 | 28 |
| The Unseen Fears: Body Thief (2017) | 0 | 0 |
| The Unseen Fears: Fortune's Consequence (2024) | 0 | 0 |
| The Unseen Fears: Last Dance (2018) | 0 | 0 |
| The Unseen Fears: Ominous Talent (2020) | 0 | 0 |
| The Unseen Fears: Outlive (2017) | 0 | 0 |
| The Unseen Fears: Stories Untold (2019) | 0 | 0 |
| Unsighted (2021) | 2,145,169 | 2,511 |
| The Unsolved (1997) | 185,210,352 | 1,289 |
| Unsolved Case: Above the Law (2023) | 0 | 0 |
| Unsolved Case: Fatal Clue (2022) | 0 | 0 |
| Unsolved Case: Killer Popularity (2024) | 29,750 | 99 |
| Unsolved Case: Murderous Script (2023) | 0 | 0 |
| Unsolved Case: The Scarlet Hyacinth (2023) | 0 | 0 |
| Unsolved Crimes (2008) | 0 | 0 |
| Unsouled (2022) | 734,211 | 348 |
| The Unspoken (2016) | 36,586,548 | 841 |
| Unspottable (2020) | 17,589,815 | 711 |
