| Otou-san to Watashi - Android Edition | r151592 | 2026-05-16 |
| Otouto Freaks | r18598 | 2026-05-17 |
| Otouto Scramble | r46366 | 2026-04-21 |
| Otouto Scramble | r50878 | 2026-04-21 |
| Otouto Scramble - Remake | r79880 | 2026-04-21 |
| Otouto Shibori ~Ane-tachi no Sei Kyouiku~ Download Edition | r25629 | 2026-05-17 |
| Otouto Shibori ~Ane-tachi no Sei Kyouiku~ Package Edition | r25628 | 2026-05-15 |
| Otouto to, Natsumatsuri nite. | r64024 | 2026-05-16 |
| Otouto wa Shota Bitch ~Takumi no Baai~ | r39434 | 2026-05-17 |
| Otouto: Nichijoukei | r39042 | 2026-05-07 |
| Oto☆Puri Miwa Kohaku Hen | r30601 | 2026-05-07 |
| Otpusti i zabud' | r114676 | 2026-05-19 |
| Otrazhenie | r94387 | 2026-05-19 |
| Otrjad Geroja Dolzhen Past' v0.6.0 | r120994 | 2026-05-07 |
| Otsukoro | r105818 | 2026-05-19 |
| Otsutome Sakuya-san | r121510 | 2026-05-20 |
| Otter Of My Life - Demo | r58923 | 2026-05-13 |
| Otter Tale - Build 7 | r133950 | 2026-05-15 |
| Otter Tale - Build 9 | r110314 | 2026-05-05 |
| Otter of My Life | r66740 | 2026-04-21 |
| Otto ga mi Terukara mou Yamete… Shainryokou de Douryou tachi Nimo te Asobareru Kyonyu Hitozuma - DVDPG | r151970 | 2026-05-11 |
| Otto no Inu Ma ni... ~Watashi Odosarete, Anata ni Ienai Koto Shimashita~ | r116174 | 2026-05-13 |
| Otto no Inu Ma ni... ~Watashi Odosarete, Anata ni Ienai Koto Shimashita~ Trial Edition | r53773 | 2026-05-17 |
| Otto no Tonari de Yobai Sareru Hounyuu Nikubenki Tsuma Yuuki Chigusa | r15923 | 2026-05-15 |
| Otto o Aisuru Bakunyuu Hitozuma-tachi ga Toshishita no Saru Seiyoku ni Jurin sarete Tsugou no ii Harami Omocha ni Ochiru Made | r91467 | 2026-04-21 |
| Ottoman Dreams: Rise of Süleiman | r129450 | 2026-04-21 |
| Ou no Mimi ni wa Todokanai! - Trial Edition | r77721 | 2026-05-19 |
| Ou-sama Game | r103204 | 2026-05-20 |
| Ou-sama Juuzoku Mail Iinari no Gakuen | r20276 | 2026-05-10 |
| Ou-sama Juuzoku Mail Iinari no Gakuen - Download Edition | r111502 | 2026-05-19 |
| Ou-sama Juuzoku Mail Ou-sama Game 1-kai-me shi to Kan'nou no Kanshoku - DVDPG | r75489 | 2026-05-16 |
| Ou-sama Juuzoku Mail Ou-sama Game 2-kai-me Zetsubou to Koufun no Kanshoku - DVDPG | r76645 | 2026-05-17 |
| Ou-sama game | r105084 | 2026-05-20 |
| Ou-sama no Chou - Package Edition | r28583 | 2026-05-16 |
| Ou-sama no Shokuzai - Package Edition | r40175 | 2026-05-12 |
| Ouchi de Kurasou! - Trial Edition | r34086 | 2026-05-16 |
| Oudou Yuusha | r8621 | 2026-05-08 |
| Ougon no Rashinban | r42471 | 2026-05-10 |
| Ougon no Rashinban (PC-98) | r49445 | 2026-05-12 |
| Ouji to Dorei - Download Edition | r42995 | 2026-05-17 |
| Ouji to Dorei - Package Edition | r40307 | 2026-05-10 |
| Ouji-sama Lv1 | r13879 | 2026-05-15 |
| Ouji-sama Lv1.5 | r106628 | 2026-05-18 |
| Ouji-sama Platonic Keikaku+ | r81205 | 2026-05-19 |
| Ouji-sama ga Kureta Koi | r102718 | 2026-05-19 |
| Ouji-sama no Propose Love Tiara | r81057 | 2026-05-19 |
| Ouji-sama to Mahou no Kiss | r102755 | 2026-05-19 |
| Ouji-sama to Tatta Hitori no Watashi | r28776 | 2026-05-16 |
| Oujitachi to Mayonaka no Kiss ~Tsuki no Princess~ | r55442 | 2026-05-19 |
| Oujo & Onna Kishi W Do Gehin Roshutsu ~Chijoku no Misemono Dorei~ | r147380 | 2026-04-21 |