| Unseen Instincts v0.65 | r110057 | 2026-05-16 |
| Unseelie Court | r134260 | 2026-04-21 |
| Unscripted Romance | r56791 | 2026-04-21 |
| Unscripted - Early Access | r103421 | 2026-04-21 |
| Unscripted - Demo | r103420 | 2026-04-21 |
| Unscripted - Demo | r68464 | 2026-04-21 |
| Unscripted | r76453 | 2026-04-21 |
| Unsatisfied | r127256 | 2026-04-21 |
| Unring The Bell - Demo | r128535 | 2026-05-06 |
| Unrequited loveリメイク版 | r124297 | 2026-04-21 |
| Unraveling August [v0.3] | r106506 | 2026-04-21 |
| Unraveling August [v0.3.04] | r106725 | 2026-04-21 |
| Unraveling Angel: Coward's Paradise v0.4.0 | r102794 | 2026-04-21 |
| Unraveling Angel: Coward's Paradise v0.3.1 | r104777 | 2026-04-21 |
| Unraveling Angel - Demo | r128632 | 2026-04-21 |
| Unraveling Angel | r113308 | 2026-05-17 |
| Unravel trigger -Prelude to War- | r133215 | 2026-05-13 |
| Unravel trigger - Trial Edition | r118505 | 2026-05-10 |
| Unravel Trigger [Full UI, CGs, Credits] (base game only) | r154791 | 2026-05-13 |
| Unravel Trigger | r121705 | 2026-04-21 |
| Unquiet Grey - Part One | r143527 | 2026-04-21 |
| Unprecedented Genius | r152653 | 2026-04-21 |
| Unpolished | r29211 | 2026-04-21 |
| Unplugged. | r144309 | 2026-04-21 |
| Unplanned AMOUR | r41004 | 2026-04-21 |
| Unova Nights - Episode 2: Shauntal | r109641 | 2026-05-16 |
| Uno Game | r145911 | 2026-05-10 |
| Unnatural Urges | r122512 | 2026-04-21 |
| Unnatural Instinct [v0.8.5] | r121731 | 2026-04-21 |
| Unmoor | r56741 | 2026-04-21 |
| Unmei no Mahou o ~Last Chapter~ | r67604 | 2026-05-09 |
| Unmei no Mahou o ~Chapter 3 - "Revolver"~ | r67602 | 2026-05-09 |
| Unmei no Mahou o ~Chapter 2 - "Deviate"~ | r67601 | 2026-05-10 |
| Unmei Yohou o Oshirase Shimasu | r148196 | 2026-05-13 |
| Unmei Yohou o Oshirase Shimasu | r23870 | 2026-05-05 |
| Unmei Senjou no Phi - Trial Edition | r35694 | 2026-05-05 |
| Unmei Senjou no Phi - First Press Limited Edition | r34151 | 2026-05-08 |
| Unmasked Truths: Shattered Dreams - Tech Demo | r140776 | 2026-05-12 |
| Unmasked Truths: Shattered Dreams | r140777 | 2026-04-21 |
| Unmasked | r149437 | 2026-04-21 |
| Unlucky Re:Birth/Reverse - Trial Edition | r42968 | 2026-05-16 |
| Unlucky Re:Birth/Reverse - First Press Limited Edition | r40269 | 2026-05-12 |
| Unluckily in Love: Fragments of Love | r126551 | 2026-05-11 |
| Unluckily in Love: Fragments of Love | r134023 | 2026-04-21 |
| Unluckily in Love - Demo | r105593 | 2026-05-16 |
| Unluckily in Love - Demo | r103672 | 2026-04-21 |
| Unluckily in Love - Censored Edition | r105592 | 2026-05-14 |
| Unluckily in Love - Censored Edition | r121602 | 2026-05-12 |
| Unluckily in Love - Censored Edition | r121601 | 2026-05-12 |
| Unluckily in Love - Censored Edition | r97008 | 2026-05-07 |