| One Week in Weeping Pine | r133497 | 2026-04-21 |
| One Week of Eternity | r7619 | 2026-04-21 |
| One With the Snow | r85316 | 2026-05-16 |
| One and Only | r991 | 2026-04-21 |
| One day | r99297 | 2026-04-21 |
| One day of spring break with her - Demo | r123192 | 2026-05-14 |
| One day with 1701 | r122823 | 2026-04-21 |
| One in One Million | r150012 | 2026-04-21 |
| One more Chance!! | r97392 | 2026-04-21 |
| One of Won Won -The One of Wonwon- First Press Edition | r23363 | 2026-05-15 |
| One to Three: Sovereignty - Demo | r74154 | 2026-04-21 |
| One x Shota | r19345 | 2026-05-06 |
| One x Shota - DVDPG | r153466 | 2026-05-12 |
| One ~Binnaneun Gyejeollo~ Full Voice Edition | r67317 | 2026-05-12 |
| One ~Guanghui de Jijie~ | r41414 | 2026-05-13 |
| One ~Sekai de Tada Hitori Boku no Kimi wa Hitori Dake~ | r6933 | 2026-05-10 |
| One ~To the Radiant Season~ | r133 | 2026-04-21 |
| One ~hacia una radiante estación~ | r13120 | 2026-04-21 |
| One ~輝く季節へ~ | r73418 | 2026-04-21 |
| One → Shota ← One - Package Edition | r73481 | 2026-05-16 |
| One ☆ Boku - Faraway so close! ~Onee-chan to Boku~ | r4041 | 2026-05-12 |
| One&Only | r105584 | 2026-04-21 |
| One&Only 体験版 | r105594 | 2026-04-21 |
| One's First Love | r50380 | 2026-04-21 |
| One's Inside | r27768 | 2026-04-21 |
| One's Inside 体験版 | r30155 | 2026-04-21 |
| One's Lonesome, Two's Company | r60558 | 2026-04-21 |
| One's Own [or very] | r21817 | 2026-04-21 |
| One, Two, Three Fiancées?! | r121134 | 2026-04-21 |
| One-Eyed Lee and the Dinner Party | r82393 | 2026-05-09 |
| One-Eyed Lee and the Dinner Party | r111282 | 2026-04-21 |
| One-Eyed Lee and the Dinner Party | r111283 | 2026-04-21 |
| One-Eyed Lee and the Dinner Party | r68728 | 2026-04-21 |
| One-Eyed Lee and the Dinner Party | r82392 | 2026-04-21 |
| One-Eyed Lee and the Dinner Party | r82394 | 2026-04-21 |
| One-Eyed Lee and the Dinner Party - Asia Download Edition | r84772 | 2026-04-21 |
| One-Eyed Lee: Prologue | r52177 | 2026-04-21 |
| One-Hit Wonder | r86025 | 2026-04-21 |
| One-armed Crayfish | r146544 | 2026-05-11 |
| One-armed Crayfish | r146543 | 2026-04-21 |
| OneDayOne | r131255 | 2026-04-21 |
| OneDayOne | r130714 | 2026-04-21 |
| OneNightGame | r28055 | 2026-04-21 |
| OneNightGame ダウンロード版 | r28054 | 2026-04-21 |
| OneNightGame 体験版 | r28056 | 2026-04-21 |
| Onedari Milk Princess - Regular Edition | r7330 | 2026-05-06 |
| Onedari Onapet - Package Edition | r4334 | 2026-05-07 |
| Onee no Koisuru Nanokakan ~Manatsu no secret love~ | r147690 | 2026-05-15 |
| Onee-chan (tachi) wa Osewa Saretai! - Package Edition | r105227 | 2026-05-15 |
| Onee-chan Dou Shiyou. Boku, Shokushu Haechatta. - Package Edition | r152311 | 2026-05-15 |