| ONE.DL版 | r114956 | 2026-04-21 |
| ONE.体験版 | r114844 | 2026-04-21 |
| ONE2～永遠の約束～ | r72187 | 2026-04-21 |
| ONE2～永遠の約束～ with Voice | r61721 | 2026-04-21 |
| ONE2～永遠の約束～ 初回限定版 | r1323 | 2026-04-21 |
| ONE2～永遠の約束～ 通常版 | r1322 | 2026-04-21 |
| ONE2～永遠の約束～with Voice | r1321 | 2026-04-21 |
| ONE2～永遠の約束～with Voice ダウンロード版 | r65757 | 2026-04-21 |
| ONEROOM - 開発版 | r105856 | 2026-04-21 |
| ONE☆BOKU Faraway so close！～お姉ちゃんとボク～ | r4041 | 2026-04-21 |
| ONE☆BOKU Faraway so close！～お姉ちゃんとボク～ DL版 | r71814 | 2026-04-21 |
| ONE～光辉的季节～ | r41414 | 2026-04-21 |
| ONE～光辉的季节～ | r7537 | 2026-04-21 |
| ONE～輝く季節へ～ PSP移植化計画 | r145539 | 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 |
| ONE～輝く季節へ～ フルボイス版 | r131 | 2026-04-21 |
| ONIGAWARA ～The god's holy war and record～ | r83372 | 2026-04-21 |
| ONIONION - Demo | r131572 | 2026-04-21 |
| ONLY YOU - Download Edition | r9388 | 2026-04-21 |
| ONLY YOU - Package Edition | r9387 | 2026-04-21 |
| ONLY YOU 2 - Download Edition | r9390 | 2026-04-21 |
| ONLY YOU 2 - Package Edition | r9389 | 2026-04-21 |
| ONTOMO | r31096 | 2026-04-21 |
| ONYX ~separate dream~ | r101198 | 2026-04-21 |
| OP9: The Cold War Visual Novel | r68860 | 2026-04-21 |
| OPERATION: GET BICHES! | r104141 | 2026-04-21 |
| OPHELIA | r75462 | 2026-04-21 |
| 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 | 2026-04-21 |
| OPPAI Ero App Academy: Bigger, Better, Electric Boobaloo | r117402 | 2026-04-21 |
| OPPAI Succubus Academy Sucky and Busty, Demonic and Lusty! - Prologue v0.1 | r129378 | 2026-04-21 |
| OPPAI Succubus Academy Sucky and Busty, Demonic and Lusty! Special Mosaic Removal DLC | r124524 | 2026-04-21 |
| 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 |
| OPPAIライフ おはようからおやすみまで揉み吸い生活 ダウンロード版 | r21809 | 2026-04-21 |
| OPPAIライフ おはようからおやすみまで揉み吸い生活 パッケージ版 | r12946 | 2026-04-21 |
| OPUS: Echo of Starsong | r92949 | 2026-04-21 |
| OPUS: Echo of Starsong - Full Bloom Edition | r92950 | 2026-04-21 |
| OPUS: Echo of Starsong - Full Bloom Edition [Collector's Edition] | r115485 | 2026-04-21 |
| OPUS：龍脈常歌 -最終版- | r92997 | 2026-04-21 |
| OPUS：龍脈常歌 -最終版- | r108973 | 2026-04-21 |
| ORANGE PEEL | r88848 | 2026-04-21 |
| ORATORIO～海より青い夏の彼方で～ | r12267 | 2026-04-21 |
| ORATORIO～海より青い夏の彼方で～ 差分ファイル03のDL | r144925 | 2026-04-21 |
| ORBIT 5 | r145527 | 2026-04-21 |
| ORBIT 5 - Demo | r145526 | 2026-04-21 |
| ORBIT 5 - Demo | r145528 | 2026-04-21 |
| ORCA_HOTEL | r147478 | 2026-04-21 |
| ORIN GAMBLE | r152365 | 2026-04-21 |