| Once Needed Never Found | r110280 | 2026-06-04 |
| Once More - Package Edition | r70107 | 2026-06-03 |
| Once More - Early Access | r70106 | 2026-05-28 |
| Once More - Demo | r73816 | 2026-04-21 |
| Once More | r35130 | 2026-05-27 |
| Once Clover Died | r127632 | 2026-05-30 |
| Once By Moonlight | r91074 | 2026-06-06 |
| Once Again | r138433 | 2026-05-21 |
| Onatetsu Romance | r126648 | 2026-06-04 |
| Onatan! ~Bishoujo Tantei Monogatari~ Download Edition | r32193 | 2026-06-01 |
| Onapet☆Academy ~Kenja no Niku Tsubo~ Package Edition | r128965 | 2026-06-03 |
| Onapet Tenshi ~ Himeko - Package Edition | r127423 | 2026-06-04 |
| Onapet Tenshi ~ Himeko - Download Edition | r111737 | 2026-06-02 |
| Onanii You Novel Fuu Mini Game ~Nyotaika | Imouto ni Natte Ninshin Shichatta, Ore. | r92177 | 2026-06-02 |
| Onanie Shoujo to Hentai Kyoushi no Koufuku na Ketsumatsu | r111738 | 2026-06-04 |
| Onaka no Oku Made Furesasete!! | r148079 | 2026-06-10 |
| Onaka no Naka made Aishite ne! | r88593 | 2026-06-02 |
| Onaji Jidai ni Sonna Basho de - Chapters 1 & 2 | r121105 | 2026-05-30 |
| Onaji Jidai ni Sonna Basho de - Chapter 1 | r121104 | 2026-05-30 |
| Onaji Class no Idol-san. Around me is full by a celebrity. - Trial Edition | r65067 | 2026-05-22 |
| Onaji Class no Idol-san. Around me is full by a celebrity. - Special Limited Edition | r64028 | 2026-06-02 |
| Onaji Class no Idol-san. Around me is full by a celebrity. - H Scene Trial Edition | r65510 | 2026-06-03 |
| Onaji Class no Idol-san. Around me is full by a celebrity. - First Press Edition | r64029 | 2026-06-02 |
| Onaji Class no Idol-san. Around me is full by a celebrity. - Download Edition | r66575 | 2026-06-02 |
| Onaji Class no Idol-san. Around me is full by a celebrity. | r142707 | 2026-06-03 |
| Onaji Class no Idol-san. Around me is full by a celebrity | r147382 | 2026-05-21 |
| Onahole | r18436 | 2026-06-06 |
| Onago Life 2 | r57259 | 2026-06-02 |
| Onachuu! - Package Edition | r10191 | 2026-05-21 |
| Onachuu! - Download Edition | r30232 | 2026-06-03 |
| Onachu! - Download Edition | r36756 | 2026-06-05 |
| OnaKen! 2 | r131387 | 2026-06-02 |
| OnaCla Maid Life ~Class no Gyaru Maid to Resort Gohoushi Seikatsu~ | r152318 | 2026-06-02 |
| Ona risovala alyh volkov | r152847 | 2026-06-07 |
| Ona risovala alyh volkov | r139106 | 2026-06-05 |
| Ona risovala alyh volkov | r156526 | 2026-06-05 |
| Ona risovala alyh volkov | r115010 | 2026-06-02 |
| Ona Pet Raika-chan | r117329 | 2026-06-02 |
| Ona Moja Dragocennaja Ep. 1-5 | r153485 | 2026-06-05 |
| Ona Ken! 1.8 -Ushinawareta Akume | r36033 | 2026-05-18 |
| Ona Ken! 1.8 | r124225 | 2026-04-21 |
| Ona Ken! 1.6 | r124224 | 2026-04-21 |
| Ona Ken! 1.4 | r124223 | 2026-04-21 |
| Ona Ken! 1.2 | r124222 | 2026-05-20 |
| Ona Ken! 1. 2 | r29720 | 2026-05-16 |
| Ona Ken! -International- Re-translation | r114026 | 2026-06-04 |
| Ona Ken! -International- | r42617 | 2026-04-21 |
| Ona Ken! | r37642 | 2026-05-06 |
| Ona Kan ~Chiisana Kanzume~ | r117054 | 2026-05-16 |
| On ~Ongaeshi~ | r120788 | 2026-06-07 |