| Overnight Tea | r111935 | 2026-05-20 |
| Overpowered - Episode 12 | r95623 | 2026-04-21 |
| Overtime - Demo | r128822 | 2026-05-20 |
| Overtime - Demo | r133662 | 2026-05-20 |
| Overworked! v1.1.0.3 | r146115 | 2026-05-08 |
| Overwrite White. | r52180 | 2026-05-10 |
| Overwritten Save | r138794 | 2026-05-08 |
| Ovidius: Blood for Love: Act III P3 | r135503 | 2026-05-09 |
| Ovine Replica | r61245 | 2026-05-15 |
| Ovine Replica | r101788 | 2026-04-21 |
| Ovine Replica (Demo Ver.) | r66297 | 2026-04-21 |
| Ovulating Maiden v0.20b | r114473 | 2026-05-09 |
| Owaranai Kisetsu no Mannaka de - Trial Edition | r95926 | 2026-05-17 |
| Owaranai Natsu o kimi to ~Endless Summer~ ver. 2.10 | r22954 | 2026-05-20 |
| Owari Yuki | r3868 | 2026-05-19 |
| Owari Yuki | r81711 | 2026-05-09 |
| Owari de Hajimari na Houkago ni - Trial Edition | r91524 | 2026-05-17 |
| Owari naki Maid-tachi no Yoru - Download Edition | r65974 | 2026-05-12 |
| Owari no Kane ga Naru Mae ni - Chapter 1 - Trial Edition | r111877 | 2026-05-17 |
| Owari no Kane ga Naru Mae ni - Chapter 2 | r111614 | 2026-05-15 |
| Owari no Kane ga Naru Mae ni - Chapter 3 | r129921 | 2026-05-16 |
| Owari no Mae ni | r139495 | 2026-05-16 |
| Owari no Saki no, Hakoniwa | r29775 | 2026-05-16 |
| Owari no Seraph: Unmei no Hajimari - Download Edition | r69447 | 2026-05-19 |
| Owari no Seraph: Unmei no Hajimari - Physical Edition | r43364 | 2026-05-16 |
| Owarinaki Maid-tachi no Yoru - Reprint Edition | r95702 | 2026-05-17 |
| Owaru Sekai to Birthday - First Press Edition | r18443 | 2026-05-16 |
| Owaru Sekai to Futagoza no Paradise | r30352 | 2026-05-17 |
| Owl's Tale | r140327 | 2026-05-08 |
| Own My God | r82181 | 2026-05-20 |
| Own My God | r82180 | 2026-05-09 |
| Owner | r61375 | 2026-05-07 |
| Oxidated Heart v1.0 | r107049 | 2026-04-21 |
| Oxygenerator | r106783 | 2026-05-07 |
| Oyabake! | r82154 | 2026-04-21 |
| Oyabake! 2 | r82970 | 2026-05-14 |
| Oyako Donburi | r11218 | 2026-05-20 |
| Oyako Donburi 2 ~Akira no Baai~ | r11216 | 2026-05-19 |
| Oyako Donburi 3 DVDPG Akira Hen | r20540 | 2026-05-07 |
| Oyako Donburi DVD | r12025 | 2026-05-20 |
| Oyako Donburi Full Voice - Download Edition | r55032 | 2026-05-17 |
| Oyako Donburi Nakadashi... Hahaoya Ninshin - DVDPG | r25671 | 2026-05-19 |
| Oyako Donburi SC | r11219 | 2026-05-20 |
| Oyako Donburi SC - DVDPG | r11220 | 2026-05-20 |
| Oyako Donburi wa Ikka Danran no Mae ni H na Oyako wa Suki Desu ga? | r22777 | 2026-05-13 |
| Oyako Kissa ~Ryoujoku Maid Café ni Youkoso~ | r13501 | 2026-05-06 |
| Oyako Koukan ~Watashi no Oshiri ni Shimitsuite Iku Osu no Nioi~ DVDPG | r36525 | 2026-05-09 |
| Oyako Koukan ~Watashi no Oshiri ni Shimitsuite Iku Osu no Nioi~ Package Edition | r30331 | 2026-05-17 |
| Oyako Mix Ijiri ~Mucchiri Haha to Binyuu na Musume no Inniku Kaihatsu - Package Edition | r33030 | 2026-05-10 |
| Oyako Mix Ijiri ~Mucchiri Haha to Binyuu na Musume no Inniku Kaihatsu - Trial Edition | r34177 | 2026-05-10 |