| Our Wonderland Remastered | r148767 | 2026-05-12 |
| Our Wonderland Remastered - Alpha Build | r126655 | 2026-05-11 |
| Our World Has Not Decayed | r67068 | 2026-04-21 |
| Our World Is Ended. - EU Day One Edition | r105848 | 2026-04-21 |
| Our World Is Ended. - EU Day One Edition | r61651 | 2026-04-21 |
| Our World Is Ended. - EU Download Edition | r62623 | 2026-04-21 |
| Our World Is Ended. - EU Edition | r105850 | 2026-05-11 |
| Our World Is Ended. - EU Edition | r61653 | 2026-05-11 |
| Our World Is Ended. - NA Day One Edition | r105852 | 2026-05-11 |
| Our World Is Ended. - NA Day One Edition | r61652 | 2026-04-21 |
| 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: 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 |
| Ouritsu Nekomimi Gakuen ~Anata no Tame no Hatsujouki♪~ | r11084 | 2026-05-15 |
| Ourselves v1.1.1.b | r91129 | 2026-04-21 |
| Oushitsu no Yoru ~Kakureta Omoi~ | r102756 | 2026-05-13 |
| Out Run -Complete Pac- | r104414 | 2026-04-21 |
| 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 | 2026-04-21 |
| 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 | 2026-04-21 |
| Out of Office | r146703 | 2026-04-21 |
| Out of Orbit | r132679 | 2026-04-21 |
| Out of Puberty: Chapter 1 | r88771 | 2026-04-21 |
| Out of Sight | r50043 | 2026-04-21 |
| Out of Sight | r42558 | 2026-04-21 |
| Out of Sync - Complete Cherry Bomb Version | r47639 | 2026-04-21 |
| Out of Sync - Free Edition | r47638 | 2026-04-21 |
| Out of Sync: Crescendo | r55687 | 2026-05-12 |
| Out of This World - Demo | r105794 | 2026-04-21 |
| Out of This World: Chapter 1-6 | r91054 | 2026-04-21 |
| Out of Time | r143377 | 2026-04-21 |
| Out of Touch! - Chapter 58 (v4.0.1) | r82103 | 2026-04-21 |
| Out of Touch! - Chapter 58 - Android Edition | r102182 | 2026-04-21 |
| Out of Touch! 1080p HD Patch | r104552 | 2026-04-21 |
| Out of Touch! v4.0.1 | r96312 | 2026-05-13 |
| Out of Tune | r149831 | 2026-05-10 |
| Out of Water | r140432 | 2026-04-21 |
| Out of Water - Demo | r140460 | 2026-04-21 |
| Out of Your Mind | r129172 | 2026-04-21 |
| Out of Your Mind - Demo | r129171 | 2026-04-21 |