| Obore Ai ~Nandemo Suru kara Sutenaide!~ | r101683 | 2026-05-20 |
| Oboreta Saki no Ori no Naka | r124684 | 2026-05-20 |
| Oborokomachi | r7374 | 2026-05-19 |
| Oborokomachi - Price Revised Edition | r26235 | 2026-05-19 |
| Obozhaemyj brak: Chapter 1 v0.5 | r132215 | 2026-05-17 |
| Obrenor: The Outcast Prince v0.4.0b | r57312 | 2026-04-21 |
| Obscene Guild -Katayoku no Datenshi- Download Edition | r29944 | 2026-05-15 |
| Obscene Guild -Katayoku no Datenshi- Trial Edition | r29943 | 2026-05-19 |
| Obscene Medical Records of a Married Nurse | r34485 | 2026-04-21 |
| Obscene Medical Records of a Married Nurse | r120605 | 2026-04-21 |
| Obscene Service 2 - Download Edition | r46067 | 2026-05-20 |
| ObsceneGuild -片翼の堕天使- | r9957 | 2026-04-21 |
| ObsceneGuild -片翼の堕天使- OOS体験版 | r29945 | 2026-04-21 |
| ObsceneService2 パッケージ版 | r12835 | 2026-04-21 |
| Obscura Incarnate | r122195 | 2026-05-20 |
| Obscure Affairs v2.80 | r91910 | 2026-05-20 |
| Obsession | r127558 | 2026-05-20 |
| Obsession | r78381 | 2026-04-21 |
| Obsession - Demo | r145801 | 2026-05-20 |
| Obsession Free Demo/Prologue | r78380 | 2026-04-21 |
| Obsession High - Demo | r153156 | 2026-04-21 |
| Obsession The Complete Version | r115603 | 2026-04-21 |
| Obsoletion | r138779 | 2026-05-20 |
| Obydennaja procedura | r136049 | 2026-05-17 |
| Occhiolism | r123468 | 2026-04-21 |
| Occhiolism | r118425 | 2026-04-21 |
| Occult Absence | r65349 | 2026-05-20 |
| Occult Buster Non | r109528 | 2026-05-16 |
| Occult Crime Police | r83797 | 2026-05-20 |
| Occult Crime Police | r61052 | 2026-05-19 |
| Occult Crime Police: Medium at Large | r119240 | 2026-05-19 |
| Occult Gakuen Nana Fushigi | r116998 | 2026-05-21 |
| Occult Hand of the Blood Lily | r146406 | 2026-05-20 |
| Occult Rewrite | r92854 | 2026-05-20 |
| Occult Rewrite - Free Edition | r87433 | 2026-05-16 |
| Occult Rewrite - Starving Artist Edition | r87434 | 2026-05-20 |
| Occult Taisaku Iinkai Nisemono no Yogensha | r96927 | 2026-05-17 |
| Occultic Pizza - Demo | r114451 | 2026-05-19 |
| Occultic;Nine - Download Edition | r54332 | 2026-05-20 |
| Occultic;Nine - Download Edition | r54331 | 2026-05-20 |
| Occultic;Nine - Download Edition | r54330 | 2026-05-15 |
| Occultic;Nine - Limited Edition | r54200 | 2026-05-19 |
| Occultic;Nine - Limited Edition | r54201 | 2026-05-16 |
| Occultic;Nine - Regular Edition | r51835 | 2026-05-20 |
| Occultic;Nine - Regular Edition | r39470 | 2026-05-20 |
| Occultic;Nine - Regular Edition | r48405 | 2026-05-06 |
| Occultist Academy - Chapter 1 | r137391 | 2026-05-20 |
| Occultus | r53487 | 2026-05-20 |
| Occultus: Daughter of Darkness | r110602 | 2026-05-20 |
| Occultus: The Craving: Chapter 6 R1 | r135355 | 2026-05-15 |