| ONE X -Winter Side- | r94613 | 2026-05-05 |
| ONE ~Guanghui de Jijie~ | r7537 | 2026-05-13 |
| ONE ~Kagayaku Kisetsu e~ | r61871 | 2026-05-11 |
| ONE ~Kagayaku Kisetsu e~ | r137221 | 2026-05-10 |
| ONE ~Kagayaku Kisetsu e~ - PSP Porting Project | r145539 | 2026-05-11 |
| ONE ~Kagayaku Kisetsu e~ First Press Limited Edition | r268 | 2026-05-10 |
| ONE ~Kagayaku Kisetsu e~ Full Voice Edition | r131 | 2026-05-12 |
| ONE ~Kagayaku Kisetsu e~ Memorial Selection Mou Ichido Kimi ni Aitai | r5300 | 2026-05-10 |
| ONE ~Kagayaku Kisetsu e~ Regular Edition | r5299 | 2026-05-10 |
| ONE-Vers une saison radieuse | r153158 | 2026-05-12 |
| ONE. | r122138 | 2026-05-12 |
| ONE. | r117100 | 2026-05-11 |
| ONE. | r148702 | 2026-05-10 |
| ONE. | r153086 | 2026-04-21 |
| ONE. | r93735 | 2026-04-21 |
| ONE. - Download Edition | r114847 | 2026-05-12 |
| ONE. - Download Edition | r114956 | 2026-05-12 |
| ONE. - Physical Edition | r101350 | 2026-05-10 |
| ONE. - Steam Edition | r107886 | 2026-05-12 |
| ONE. Demo Title Screen Fix Patch | r117025 | 2026-05-11 |
| ONE. Eternity Patch | r126086 | 2026-04-21 |
| ONE. Memorial BOX | r107890 | 2026-05-12 |
| ONE. Steam体験版 | r116110 | 2026-04-21 |
| ONE. メモリアルBOX | r107889 | 2026-04-21 |
| ONE. 体験版 | r114845 | 2026-04-21 |
| ONE.体験版 | r114844 | 2026-04-21 |
| ONEROOM - Development Version | r105856 | 2026-05-12 |
| ONE☆BOKU Faraway so close！～お姉ちゃんとボク～ DL版 | r71814 | 2026-04-21 |
| ONE～輝く季節へ～ VISTA動作確認版 ダウンロード版 | r6979 | 2026-04-21 |
| ONE～輝く季節へ～ Vista動作確認版 | r132 | 2026-04-21 |
| ONF ~Tatakau Rasetsu e~ | r73119 | 2026-05-11 |
| ONIONION - Demo | r131572 | 2026-05-13 |
| ONLY YOU - Download Edition | r9388 | 2026-05-12 |
| ONLY YOU - Package Edition | r9387 | 2026-04-21 |
| ONLY YOU 2 - Download Edition | r9390 | 2026-04-21 |
| ONLY YOU 2 - Package Edition | r9389 | 2026-05-12 |
| ONYX ~separate dream~ | r101198 | 2026-05-06 |
| OP9: The Cold War Visual Novel | r68860 | 2026-05-12 |
| OPERATION: GET BICHES! | r104141 | 2026-05-07 |
| OPHELIA | r75462 | 2026-05-13 |
| OPPAI Academy: Big, Bouncy, Booby Babes! | r114737 | 2026-04-21 |
| OPPAI Academy: Big, Bouncy, Booby Babes! 18+ Patch | r79527 | 2026-04-21 |
| OPPAI Ero App Academy Bigger, Better, Electric Boobaloo! | r114811 | 2026-05-13 |
| OPPAI Ero App Academy: Bigger, Better, Electric Boobaloo | r117402 | 2026-05-13 |
| OPPAI Life - Ohayou kara Oyasumi made Momisui Seikatsu - Download Edition | r21809 | 2026-05-12 |
| OPPAI Life - Ohayou kara Oyasumi made Momisui Seikatsu - Package Edition | r12946 | 2026-05-13 |
| OPPAI Succubus Academy Sucky and Busty, Demonic and Lusty! - Prologue v0.1 | r129378 | 2026-05-12 |
| OPPAI Succubus Academy Sucky and Busty, Demonic and Lusty! Special Mosaic Removal DLC | r124524 | 2026-05-13 |
| OPPAIライフ おはようからおやすみまで揉み吸い生活 DVDPG | r143930 | 2026-04-21 |
| OPUS: Echo of Starsong | r92949 | 2026-05-12 |