| Omoi Hito o Omou Hito | r97327 | 2026-06-03 |
| Omocha no Jikan | r98089 | 2026-05-30 |
| Omocha no Chachacha: Hatsune Hen | r68810 | 2026-06-10 |
| Omocha no Chachacha Vol. 3: Noemi Hen | r68807 | 2026-06-01 |
| Omocha no Chachacha Vol. 2: Mai & Sayuri Hen | r68809 | 2026-05-31 |
| Omnibus Princess | r48991 | 2026-06-08 |
| Omnibus Princess | r48021 | 2026-04-21 |
| Omni Link | r53892 | 2026-05-27 |
| Ommetaphobia - Demo | r142460 | 2026-05-26 |
| Omiyagebanashi | r117022 | 2026-05-31 |
| Ominous blind date | r87380 | 2026-06-03 |
| Ominaeshi no Kage - Package Edition | r154420 | 2026-05-14 |
| Ominaeshi no Kage | r34029 | 2026-06-06 |
| Omikon! | r83219 | 2026-06-06 |
| Omertá ~Codeks molchaniya~ | r153512 | 2026-05-11 |
| Omertà ~Chinmoku no Okite~ The Legacy - Regular Edition | r34482 | 2026-06-03 |
| Omertà ~Chinmoku no Okite~ | r52001 | 2026-04-21 |
| Omertà v0.7 Rework | r127654 | 2026-06-03 |
| Omerta～沉默的法则～ | r133442 | 2026-04-21 |
| Omerta CODE:TYCOON | r98406 | 2026-06-05 |
| Omen Exitio: Hunger - Demo | r111975 | 2026-05-31 |
| Omen Exitio: Hunger | r111976 | 2026-05-27 |
| Omegaの視界（リマスター版) | r112851 | 2026-04-21 |
| Omegaverse IRL?! | r144575 | 2026-05-21 |
| Omegane Teacher -Valentine Plan- | r13579 | 2026-06-01 |
| Omega no Shikai Light-reWrite: Mikaifuu no Hakoniha | r85891 | 2026-05-23 |
| Omega no Shikai -Shiki no Hajimari / Mikaifuu no Hakoniha- | r2208 | 2026-05-10 |
| Omega no Shikai -Miyo Owareru Shimai Towa(●nd)- | r12438 | 2026-05-19 |
| Omega no Shikai -Aki Kaketa Shiki no Ai: Zan- | r78598 | 2026-05-12 |
| Omega no Shikai -Aki Kaketa Shiki no Ai- | r2209 | 2026-05-24 |
| Omega no Shikai -1. Shiki no Hajimari- | r78599 | 2026-06-03 |
| Omega no Shikai | r78600 | 2026-05-12 |
| Omega no Shikai | r145180 | 2026-05-11 |
| Omega Vampire - Regular Edition (USB Version) | r49300 | 2026-05-22 |
| Omega Vampire - Package Edition | r60038 | 2026-05-07 |
| Omega Vampire - First Press Deluxe Edition (USB Version) | r49299 | 2026-05-22 |
| Omega Vampire - First Press Deluxe Edition (DVD Version) | r46412 | 2026-05-21 |
| Omega Vampire - Download Edition | r84582 | 2026-05-30 |
| Omega Vampire | r133439 | 2026-06-08 |
| Omega Vampire | r64217 | 2026-06-02 |
| Omega Vampire | r114829 | 2026-05-30 |
| Omawari-san: Koitsu Desu. | r99013 | 2026-05-30 |
| Omatsuri no Yoru ni | r105076 | 2026-05-30 |
| Omatsuri Yarou | r77437 | 2026-06-10 |
| Omatase! Janbaraya♪ - First Press Edition | r20593 | 2026-05-09 |
| Omatase! Instant ~Anata wa Dare o Meshiagaru?~ Package Edition | r5012 | 2026-05-30 |
| Omatase! Instant ~Anata wa Dare o Meshiagaru?~ Download Edition | r5013 | 2026-05-30 |
| Omata Yurume wa Mama Naranai - Download Edition | r92064 | 2026-05-31 |
| Omase na Princess ~Miwaku no Lolicon Nikubenki-tachi~ | r38011 | 2026-05-30 |
| Omamori: A MP100 Fangame - Demo | r114380 | 2026-04-21 |