| Isonzo (2022) | 24,483,637 | 6,644 |
| Isopod Keeping Simulator (2025) | 0 | 0 |
| Isostasy (2022) | 558 | 3 |
| ISS Pro Evolution (1999) | 4,302,726 | 1,929 |
| ISS Pro Evolution 2 (2001) | 3,503,562 | 2,795 |
| Istaria: Chronicles of the Gifted (2003) | 287,859 | 234 |
| Istrolid (2016) | 1,043,033 | 237 |
| The Istrys (2017) | 0 | 0 |
| iStunt 2 (2011) | 150,161 | 53 |
| It Belongs in a Museum (2023) | 315,652 | 91 |
| It came from space and ate our brains (2015) | 1,245,477 | 318 |
| It Came from the Desert (1989) | 2,249,195 | 308 |
| It Consumes (2025) | 123,987 | 30 |
| It Happened Here: A Storm is Brewing (2024) | 13,349 | 29 |
| It Happened Here: Beacon of Truth (2023) | 18,128 | 72 |
| It Happened Here: Streaming Lives (2023) | 19,032 | 82 |
| It Is A Good Knight To Die (2024) | 117 | 6 |
| It Is Ticking (2023) | 1,496 | 9 |
| It Lurks Below (2019) | 1,466,722 | 840 |
| It Paints Me (2024) | 7,264 | 24 |
| It Returned To The Desert (2023) | 9,081 | 24 |
| IT Simulator (2022) | 271,977 | 50 |
| IT Specialist Simulator (2025) | 664 | 3 |
| It Stares Back (2019) | 40,798 | 17 |
| IT Startup: Tech Fodder (2024) | 3,152 | 33 |
| It Takes Two (2021) | 589,315,781 | 168,629 |
| It's a Knockout (1986) | 662,099 | 28 |
| It's a Trap (2019) | 13,385,290 | 1,024 |
| It's a Wrap! (2023) | 16,504,604 | 501 |
| It's Grim Up North (2024) | 2,691 | 13 |
| It's Killing Time (2016) | 40,942 | 53 |
| It's Kooky (2022) | 516,648 | 68 |
| It's Mealtime! (2021) | 85 | 2 |
| It's Mr. Pants (2005) | 83,008 | 88 |
| It's OK to Fail (2025) | 0 | 0 |
| It's On The Mouse (2025) | 0 | 0 |
| It's Only Money (2024) | 3,913,429 | 315 |
| It's Spring Again (2016) | 185,515 | 68 |
| It's time, Your Majesty (2025) | 575 | 4 |
| Itadaki Smash (2021) | 2,392,484 | 317 |
| Itadaki Street 2 (1994) | 860,234 | 358 |
| Itadaki Street DS (2007) | 397,726 | 283 |
| Itadaki Street Portable (2006) | 134,132 | 156 |
| Itadaki Street: Dragon Quest and Final Fantasy 30th Anniversary (2017) | 2,094,169 | 1,681 |
| Itadaki Street: Watashi no Omise ni Yottette (1991) | 32,413 | 79 |
| The Italian Job (2001) | 1,182,086 | 553 |
| The Italian Job (2003) | 706,109 | 231 |
| Italian Pizza Simulator (2026) | 0 | 0 |
| Italy '90 Soccer (1988) | 12,038 | 4 |
| Italy 1990 (1990) | 59,937 | 44 |
| ItazuraVR (2018) | 62,791 | 3 |
| ItazuraVR Safe for Work (2019) | 22,979 | 5 |
| Itch! (2003) | 8,637 | 31 |
| Item Collector Ball (2026) | 0 | 0 |
| Itoi Shigesato no Bass Tsuri No. 1 (1997) | 1,234,654 | 273 |
| ITORAH (2021) | 893,130 | 1,724 |
| iTownGamePlay UNIVERSE (2017) | 0 | 0 |
| ITribe (2025) | 0 | 0 |
| ITRP _ Aero Star (2023) | 7 | 1 |
| ITRP _ Gas Prison (2021) | 23 | 1 |
| ITRP _ Volatile Vertex (2022) | 1,334 | 6 |
| ITTA (2020) | 616,310 | 437 |
| Ittle Dew (2013) | 2,816,696 | 1,169 |
| Ittle Dew 2 (2016) | 1,603,396 | 1,058 |
| Itty Bitty Little Kitties (2025) | 0 | 0 |
| Itty Bitty Toilet Kitty (2025) | 20 | 3 |
| Iverian Wars: Craxion vs Defugel (2026) | 0 | 0 |
| iVIBRATE (2020) | 0 | 0 |
| iVRy Driver for SteamVR (2019) | 1,330 | 1 |
| Iwaihime (2020) | 545,394 | 858 |
| Iwate Mountain Dance (2020) | 7,909 | 17 |
| IWL: Interstellar Wrestling League (2006) | 96,094 | 14 |
| Iwo Jima (1986) | 3,695,128 | 225 |
| IXION (2022) | 19,331,041 | 8,995 |
| Izanami's Dream Battle (2016) | 34 | 2 |
