| Occult Crime Police: Medium at Large | r119240 | 2026-05-19 |
| Occult Crime Police | r83797 | 2026-05-20 |
| Occult Crime Police | r61052 | 2026-05-19 |
| Occult Buster Non | r109497 | 2026-05-22 |
| Occult Buster Non | r109528 | 2026-05-16 |
| Occult Absence | r65349 | 2026-05-20 |
| Occhiolism | r123468 | 2026-04-21 |
| Occhiolism | r118425 | 2026-04-21 |
| Obydennaja procedura | r136049 | 2026-06-05 |
| Obychnaja magicheskaja istorija | r13158 | 2026-06-08 |
| Obuchenie v kolledzhe + Arctic Adventure | r102544 | 2026-06-01 |
| Obsoletion | r138779 | 2026-05-30 |
| Obsession The Complete Version | r115603 | 2026-05-26 |
| Obsession High - Demo | r153156 | 2026-04-21 |
| Obsession Free Demo/Prologue | r78380 | 2026-05-21 |
| Obsession - Demo | r145801 | 2026-06-02 |
| Obsession | r127558 | 2026-05-20 |
| Obsession | r78381 | 2026-04-21 |
| Obscure Affairs v2.80 | r91910 | 2026-06-02 |
| Obscura Incarnate | r122195 | 2026-05-20 |
| ObsceneService2 パッケージ版 | r12835 | 2026-04-21 |
| ObsceneGuild -片翼の堕天使- | r9957 | 2026-04-21 |
| Obscene Service 2 - Download Edition | r46067 | 2026-05-20 |
| Obscene Medical Records of a Married Nurse | r34485 | 2026-05-26 |
| Obscene Medical Records of a Married Nurse | r120605 | 2026-04-21 |
| Obscene Guild -Katayoku no Datenshi- Trial Edition | r29943 | 2026-05-27 |
| Obscene Guild -Katayoku no Datenshi- OOS Trial Edition | r29945 | 2026-05-28 |
| Obscene Guild -Katayoku no Datenshi- Download Edition | r29944 | 2026-05-27 |
| Obretenie Utrachennogo [v0.9] | r131741 | 2026-06-04 |
| Obrenor: The Outcast Prince v0.4.0b | r57312 | 2026-04-21 |
| Obozhaemyj brak: Chapter 1 v0.5 | r132215 | 2026-05-28 |
| Oborokomachi - Price Revised Edition | r26235 | 2026-05-19 |
| Oborokomachi | r7374 | 2026-05-27 |
| Oboreta Saki no Ori no Naka | r124684 | 2026-05-28 |
| Obore Ai ~Nandemo Suru kara Sutenaide!~ | r101683 | 2026-06-09 |
| Oboetate Kids - Download Edition | r9864 | 2026-06-02 |
| Oboetate Kids - CD-R Edition | r9863 | 2026-05-28 |
| Obmen Telami : Sladkaja Al'ternativa (CD version) | r9427 | 2026-05-22 |
| Obman | r33346 | 2026-05-27 |
| Oblivisci Memorias | r112090 | 2026-05-30 |
| Oblivious Garden ~White Day | r42218 | 2026-05-16 |
| Oblivious Garden ~Carmina Burana Finn Vinnet DLC | r43028 | 2026-04-21 |
| Oblivious Garden ~Carmina Burana | r37641 | 2026-05-21 |
| Oblivio: Lost In The World | r144657 | 2026-05-11 |
| Obletheon | r133672 | 2026-05-20 |
| Oblation v0.4 | r95421 | 2026-05-27 |
| Oblachi Njasten'ku | r36215 | 2026-06-09 |
| Oblachi Njasten'ku | r36214 | 2026-05-27 |
| ObjectsInRooms-1.0.1-pc | r110037 | 2026-05-19 |
| Objects of Desire - Demo | r83714 | 2026-05-16 |