| I of the Dragon (2002) | 539,501 | 873 |
| I Play: 3-D Soccer (1991) | 10,078 | 16 |
| I Play: 3D Tennis (1992) | 1,616 | 5 |
| I Saw Black Clouds (2021) | 2,143,995 | 1,444 |
| I See Me (2025) | 0 | 0 |
| I See Red (2022) | 9,609,072 | 176 |
| I Spy Challenger! (2002) | 5,747,227 | 68 |
| I Spy Fun House (2007) | 91,056 | 58 |
| I Spy Spooky Mansion (1999) | 2,799,495 | 320 |
| I Spy Spooky Mansion Deluxe (2005) | 321,999 | 115 |
| I Spy Universe (2010) | 29,015 | 17 |
| I Think (2024) | 49,230,165 | 2,734 |
| I Walk Among Zombies Vol. 3 (2020) | 14,826 | 36 |
| I Wani Hug that Gator! (2024) | 946,192 | 653 |
| I Wanna Be A Game Dev! (2024) | 3,060 | 56 |
| I Wanna Be the Boshy (2010) | 30,511,537 | 2,907 |
| I wanna be The Cat (2017) | 273,261 | 42 |
| I Wanna Be the Guy (2007) | 331,351,572 | 52,102 |
| I Wanna Be the Guy: Gaiden (2012) | 18,054,345 | 466 |
| I wanna be The King! (2025) | 31,300 | 37 |
| I Wanna Find My Destiny (2014) | 1,176,343 | 298 |
| I Wanna Maker (2020) | 781,406 | 777 |
| I Wanna Save the Kids (2007) | 1,737,973 | 3 |
| I Want My Mommy (1983) | 82,524 | 49 |
| I Want To Be Born Again From My Girlfriend's Big Breasted Mom (2024) | 0 | 0 |
| I Want to Believe (2025) | 268,387 | 67 |
| I Want To Go Home (2024) | 4,051,758 | 263 |
| I was an Atomic Mutant! (2003) | 46,629 | 12 |
| I was here (2017) | 185,864 | 55 |
| I was rebuilt (2018) | 346 | 3 |
| I WILL BE THERE (2023) | 1,617,241 | 413 |
| I Will Be Your Eyes (2019) | 0 | 0 |
| I will purify you (2025) | 9 | 1 |
| I wish I were the Moon (2008) | 2,452,547 | 20 |
| I Write Games Not Tragedies (2025) | 0 | 0 |
| I'd Kiss THAT Fish (2024) | 0 | 0 |
| I'll be Brave, Tomorrow - Indie Adventure Platformer (2024) | 31,163 | 61 |
| I'm No Demonlord (2026) | 0 | 0 |
| I'm Not Alone (2010) | 3,275,349 | 248 |
| I'm Not Crazy (2025) | 160,682 | 118 |
| I'm Not Sleepy (2024) | 204 | 1 |
| I'm Oh, So Busy...: A Week with Yoshimi (2020) | 1,191 | 6 |
| I'm on Observation Duty 7 (2024) | 9,625,515 | 1,169 |
| I'm Pregnant at 16 (2025) | 0 | 0 |
| I'm Sorry (1985) | 23,352,573 | 1,030 |
| I'm Strongest Legend (2021) | 137,635 | 7 |
| I've Seen Everything (2022) | 317,902 | 42 |
| I, AI (2020) | 4,360,839 | 393 |
| I, Ball (1987) | 155,335 | 92 |
| I, Cyborg (2018) | 534 | 4 |
| I, Gladiator (2015) | 1,534,119 | 228 |
| I, Hope (2018) | 6,696,887 | 936 |
| I, Robot (1984) | 30,919,924 | 396 |
| I, the Forgotten One (2023) | 0 | 0 |
| I, Zombie (2011) | 13,926,820 | 565 |
| I-0: Jailbait on Interstate Zero (1997) | 0 | 0 |
| I-Chu (2015) | 686,973 | 298 |
| I-Fluid (2008) | 348,696 | 89 |
| I-Ninja (2003) | 3,503,407 | 2,409 |
| I-War (1995) | 3,897 | 22 |
| I-War (1997) | 105,616 | 88 |
| I.F.O (2017) | 194,063 | 29 |
| I.G.I.-2: Covert Strike (2003) | 17,117,453 | 8,984 |
| I.M. Meen (1995) | 1,327,747 | 223 |
| I.Q Mania (2006) | 1,739 | 2 |
| I.Q.: Intelligent Qube (1997) | 2,070,058 | 889 |
| I/O (2006) | 1,810,639 | 204 |
| IA/VT Colorful (2015) | 31,742,701 | 968 |
| IAH: INTERNET WAR (2025) | 58,803 | 8 |
| Ian Botham's Test Match (1984) | 2,565 | 9 |
| Ian's Eyes (2016) | 2,634,867 | 178 |
| Ib (2012) | 1,615,276,517 | 99,347 |
| iB Cricket (2020) | 7,478,633 | 417 |
| IBall II (1987) | 5,370 | 21 |
| Ibara (2005) | 357,720 | 218 |
