| Isle of Fall v0.5 | r129556 | 2026-04-21 |
| Isle of Maligree | r110471 | 2026-04-21 |
| Isle of Maligree - Demo Version | r111766 | 2026-04-21 |
| Isle of the Vanished | r145609 | 2026-04-21 |
| Isogashi kata no tame no Zombie Police | r140122 | 2026-05-22 |
| Isogashi kata no tame no Zombie Police | r140120 | 2026-05-22 |
| Isogashii Hito no Tame no Fuujinroku Extra | r54077 | 2026-05-21 |
| Isogashii Hito no Tame no Kaeizuka ~ Full Voice Edition | r37152 | 2026-05-22 |
| Isogashii Hito no Tame no Kaeizuka ~ Full Voice Patch | r37153 | 2026-05-16 |
| Isogashii Hito no Tame no Kaeizuka ~ No Voice Edition | r37151 | 2026-05-22 |
| Isogashii Hito no Tame no Koumakyou | r6265 | 2026-05-17 |
| Isola del;tesoro versione mezzo | r114194 | 2026-04-21 |
| Isola's Spooky Soiree - An Egg Factory Game v0.2 | r101861 | 2026-04-21 |
| Isolated Pleasure [Ch. 1-4] | r98704 | 2026-04-21 |
| Isourou - Oi, Nanda Kore wa ver | r96047 | 2026-05-22 |
| Issho ni Asobou | r96573 | 2026-05-21 |
| Issho ni Chapuchapu Time! ~Ofuro de Ichaicha Seikatsu~ | r124180 | 2026-04-21 |
| Issho ni Ikimashou Ikimashou Ikimashou | r128963 | 2026-05-22 |
| Issho ni Ikimashou Ikimashou Ikimashou | r135973 | 2026-05-22 |
| Issho ni Ikimashou Ikimashou Ikimashou | r128517 | 2026-05-22 |
| Issho ni Ikimashou Ikimashou Ikimashou | r110513 | 2026-05-22 |
| Issho ni Ikimashou Ikimashou Ikimashou | r128897 | 2026-05-22 |
| Issho ni Ikimashou Ikimashou Ikimashou | r87512 | 2026-05-21 |
| Issho ni Ikimashou Ikimashou Ikimashou - Prologue Edition | r49681 | 2026-05-21 |
| Issho ni Ikimashou Ikimashou Ikimashou - Trial Edition | r95456 | 2026-05-19 |
| Issho ni Ohiru o Tabemashou! Wanko na Kouhai Hen♪ | r63977 | 2026-05-17 |
| Issho no Noroi | r91438 | 2026-05-19 |
| Isshou Tsuika Plugin Tachie Chicubi Bansoko Patch | r55479 | 2026-05-19 |
| Isshou Tsuika Plugin Tachie Hadaka Patch | r55477 | 2026-05-21 |
| Isshou ni Ichido Dake Saku Hana no Namae de - Download Edition | r22817 | 2026-05-20 |
| Isshou ni Ichido Dake Saku Hana no Namae de - Press Edition | r22818 | 2026-05-17 |
| Isshou ni Ichido no, - Web Edition | r77458 | 2026-05-19 |
| Issleduen Rozovuju Shkatulku v0.10 - Ch.1-7 | r147519 | 2026-05-11 |
| Issunsaki wa Yuri~! | r94505 | 2026-05-22 |
| Istanbul (not Constantinople) | r91276 | 2026-05-21 |
| Ister-Tamago | r122375 | 2026-05-20 |
| Istinnaja ljubov': Lilija okrashivaetsja v alyj | r148008 | 2026-05-22 |
| Istorii Taffi v0.89.8c + v1.07.3c + Season 1 Redux +S2 Redux Demo | r101334 | 2026-05-18 |
| Istorija Aljony | r91137 | 2026-05-20 |
| Istorija Hejli | r92678 | 2026-05-09 |
| Istorija Lizy | r118786 | 2026-05-22 |
| Istorija Sem'i Arkana | r152846 | 2026-05-19 |
| Istorija l'vichek | r37007 | 2026-05-22 |
| Istorija o rycare v0.18 | r100054 | 2026-05-11 |
| Istorija odnogo neudachnika (ION) | r128738 | 2026-05-22 |
| Istorija odnogo programmista | r13521 | 2026-05-21 |
| Istorija odnogo svidanija | r20912 | 2026-05-10 |
| Istorija parka | r34178 | 2026-05-20 |
| Istorija proishozhdenija. v0.4 | r140135 | 2026-05-22 |
| Istorija trjoh sestjor | r7760 | 2026-05-16 |