| Our War Everlasting (Mature) | r41293 | 2026-04-21 |
| Our War Everlasting (Safe) | r41294 | 2026-05-26 |
| Our Winding Road | r134386 | 2026-04-21 |
| Our Winding Road | r106788 | 2026-04-21 |
| Our Wonderland | r86171 | 2026-05-14 |
| Our Wonderland | r130110 | 2026-05-10 |
| Our Wonderland Remastered | r148767 | 2026-05-12 |
| Our Wonderland Remastered - Alpha Build | r126655 | 2026-05-20 |
| Our World Has Not Decayed | r67068 | 2026-04-21 |
| Our World Is Ended. - EU Day One Edition | r105848 | 2026-06-05 |
| Our World Is Ended. - EU Day One Edition | r61651 | 2026-04-21 |
| Our World Is Ended. - EU Download Edition | r62623 | 2026-05-25 |
| Our World Is Ended. - EU Edition | r61653 | 2026-05-23 |
| Our World Is Ended. - EU Edition | r105850 | 2026-05-11 |
| Our World Is Ended. - NA Day One Edition | r61652 | 2026-05-20 |
| Our World Is Ended. - NA Day One Edition | r105852 | 2026-05-11 |
| Our World Is Ended. - NA Download Edition | r62624 | 2026-05-11 |
| Our World Is Ended. - NA Edition | r105853 | 2026-05-14 |
| Our World Is Ended. - NA Edition | r60303 | 2026-05-11 |
| Our Years Together - Demo | r58408 | 2026-05-11 |
| Our last day | r100519 | 2026-05-11 |
| Our last flight | r93260 | 2026-05-11 |
| Ourai no Gahkthun ~What a Shining Braves~ | r143710 | 2026-06-02 |
| Ourai no Gahkthun ~What a Shining Braves~ First Press "For Girls" Edition | r22746 | 2026-06-02 |
| Ourai no Gahkthun ~What a Shining Braves~ First Press Edition | r25481 | 2026-06-01 |
| Ourai no Gahkthun: Shining Night - Popular Edition | r35251 | 2026-05-05 |
| Ouran High School Host Club | r124273 | 2026-04-21 |
| Ouran Koukou Host Club - Limited Edition | r4420 | 2026-05-08 |
| Ouran Koukou Host Club DS - Limited Edition | r4422 | 2026-05-17 |
| Ouritsu Nekomimi Gakuen ~Anata no Tame no Hatsujouki♪~ | r11084 | 2026-05-15 |
| Ouritsu Ouji Gakuen◆Royal Engagement | r108356 | 2026-05-17 |
| Ourselves v1.1.1.b | r91129 | 2026-06-06 |
| Ousama Ren'ai | r152895 | 2026-05-19 |
| Ousetsugekkei ~Kaku mo Hakanakimono Naredo~ | r101591 | 2026-05-30 |
| Oushitsu no Yoru | r104038 | 2026-06-05 |
| Oushitsu no Yoru ~Kakureta Omoi~ | r102756 | 2026-05-13 |
| Oushuu Yuukai Yuugi: Pink☆Tiger | r18150 | 2026-05-19 |
| Ousono no Delta Trial | r152877 | 2026-05-19 |
| Out Run -Complete Pac- | r104414 | 2026-04-21 |
| Out Vegetables | r32655 | 2026-06-09 |
| Out Vegetables | r146941 | 2026-04-21 |
| Out Vegetables - Download Edition | r41057 | 2026-05-10 |
| Out for Blood | r47427 | 2026-04-21 |
| Out for blood | r52747 | 2026-05-26 |
| Out of A-Line - Demo | r79602 | 2026-05-11 |
| Out of Frame / Novel Game no Wakugumi o Kaeru Novel Game. | r74835 | 2026-05-13 |
| Out of Nowhere | r125324 | 2026-05-30 |
| Out of Office | r146703 | 2026-04-21 |
| Out of Orbit | r132679 | 2026-04-21 |
| Out of Puberty: Chapter 1 | r88771 | 2026-05-24 |