| Offline | r145802 | 2026-05-06 |
| Offline Meeting | r96674 | 2026-05-07 |
| Offline Shoujo - Prologue Trial Edition | r29923 | 2026-05-17 |
| OfflineTV DanganRonpa | r149301 | 2026-04-21 |
| Offscreen Scandal | r29367 | 2026-04-21 |
| Offscreen Scandal | r29366 | 2026-04-21 |
| Offside | r59539 | 2026-05-19 |
| Offside R 18+ Adults Only Patch | r148520 | 2026-04-21 |
| Offsuit Pair | r138640 | 2026-04-21 |
| Ofukai | r33961 | 2026-05-05 |
| Ofukai - Trial Edition | r33962 | 2026-05-11 |
| Ogamika no Himegoto | r94347 | 2026-05-19 |
| OgamiyaZIN | r128064 | 2026-05-16 |
| Ogeretsu Daihyakka - DVDPG | r153861 | 2026-05-19 |
| Ogichin ~Daiikkai Ogiue ga Futanari Dattara Dou Suru ka Kaigi~ | r22820 | 2026-05-17 |
| Ogon'ki | r115072 | 2026-05-19 |
| Ograidet | r152163 | 2026-05-06 |
| Oh Daddy - v0.3 | r84440 | 2026-05-05 |
| Oh Daddy v0.8 | r109537 | 2026-05-07 |
| Oh Daddy: Part 1 (v0.9) | r82540 | 2026-04-21 |
| Oh Daddy: Part 1 (v0.9) + Part 2 (v1.0) | r109536 | 2026-05-14 |
| Oh Daddy: Part 1 (v0.9) + Part 2 (v1.0) | r130926 | 2026-04-21 |
| Oh Daddy: Part 2 (v1.0) | r113934 | 2026-04-21 |
| Oh Josiah | r30037 | 2026-04-21 |
| Oh Mai Tiara: The Road For Love | r133142 | 2026-05-18 |
| Oh Mai Tiara: The Road For Love - Demo | r81759 | 2026-05-13 |
| Oh Mai Tiara: The Road For Love - Demo | r77210 | 2026-04-21 |
| Oh My Cod!!: We Mer-Made For Each Other! | r109813 | 2026-05-20 |
| Oh My goof Knight![Oh My lost sister...同梱ver] | r45656 | 2026-04-21 |
| Oh No! I Died and Woke Up a Greek God! | r122209 | 2026-05-19 |
| Oh No, It's Monday! | r146651 | 2026-04-21 |
| Oh Papochka v0.3 | r125167 | 2026-05-20 |
| Oh Yuusha yo, Itte Shimau to wa Nasakenai! | r116359 | 2026-05-16 |
| Oh Yuusha yo, Itte Shimau to wa Nasakenai! - Download Edition | r43230 | 2026-05-06 |
| Oh Yuusha yo, Itte Shimau to wa Nasakenai! - Package Edition | r40861 | 2026-05-10 |
| Oh Yuusha yo, Itte Shimau to wa Nasakenai! DVDPG | r149177 | 2026-05-10 |
| Oh my goof knight! | r45655 | 2026-04-21 |
| Oh no! I have a cosplay fanclub - Demo | r121436 | 2026-04-21 |
| Oh! Kitsune-sama☆ | r17897 | 2026-05-12 |
| Oh! Kitsune-sama☆ | r88560 | 2026-05-12 |
| Oh! Kitsune-sama☆ - CD Edition | r17898 | 2026-05-12 |
| Oh! Mama-goto! | r84364 | 2026-05-17 |
| Oh! Pai | r42389 | 2026-05-12 |
| Oh! Pai | r42387 | 2026-05-12 |
| Oh!! Micro-Man ~Chiisaku Natte Onna no Ko no Ironna Tokoro ni Haicchao~ Download Edition | r44608 | 2026-05-09 |
| Oh, Blossom! | r73346 | 2026-05-19 |
| Oh, Blossom! | r87173 | 2026-04-21 |
| Oh, Terry! | r90395 | 2026-05-08 |
| Oh, Yes! 2. Beach Volley Party | r54555 | 2026-04-21 |
| Oh, Yes! Kasshoku Bitch Hitozuma no Seiyoku Kaishou ~Ero Ero Dekiru Mama-san Volley Kai~ | r63450 | 2026-05-20 |