| Old Gay Cats Look at Old Photos | r105783 | 2026-05-06 |
| Old Gay Cats Look at Old Photos - Yuri Game Jam Version | r99899 | 2026-05-14 |
| Old Software | r90053 | 2026-05-14 |
| Old Software | r76980 | 2026-05-05 |
| Old Story | r30039 | 2026-04-21 |
| Old Web Cobwebs | r121442 | 2026-04-21 |
| Old-Timer | r15573 | 2026-04-21 |
| Olga Doesn't Die | r148032 | 2026-05-07 |
| Olga Mania | r128335 | 2026-05-21 |
| Oliver Renhelf | r51278 | 2026-04-21 |
| Olivia Dwight | r103854 | 2026-04-21 |
| Olivia's Bad Day | r122505 | 2026-05-19 |
| Olivia's Bad Day | r122504 | 2026-04-21 |
| Olivine Lights | r134475 | 2026-04-21 |
| Ollyeoda Bwa, Bamhaneurui Byeoreul : Interstellar Focus | r127064 | 2026-05-16 |
| Olympia Soiree | r86932 | 2026-05-05 |
| Olympia Soiree (demo) | r87930 | 2026-05-19 |
| Olympia Soiree - Download Edition | r69185 | 2026-05-14 |
| Olympia Soirée - Download Edition | r95963 | 2026-04-21 |
| Olympia Soirée - Package Edition | r76178 | 2026-05-13 |
| Olympus Rising | r136555 | 2026-04-21 |
| Olympus Rising: Ragnarok | r142353 | 2026-04-21 |
| OmOneko | r105243 | 2026-05-07 |
| OmOneko | r143183 | 2026-05-06 |
| Oma Mote!! Okawari - Free Edition | r117534 | 2026-05-20 |
| Omae ga Motetaitte Iu kara Daro!! | r103860 | 2026-05-09 |
| Omae ga Motetaitte Iu kara Daro!! Okawari (1) | r97055 | 2026-05-12 |
| Omae no Kaa-chan, Ii Onna Da yo na | r79684 | 2026-04-21 |
| Omae no Kaa-chan, Ii Onna Da yo na. | r119310 | 2026-05-17 |
| Omae no Kaa-chan, Ii Onna Da yo na. | r73797 | 2026-05-16 |
| Omae no Kaa-chan, Ii Onna Da yo na. - Download Edition | r55329 | 2026-05-19 |
| Omae no Kaa-chan, Mesu Buta Niku Benki ni Nattenzo? | r17971 | 2026-05-05 |
| Omae no Mono wa Ore no Mono - Price Revised Edition | r25931 | 2026-05-16 |
| Omae no Mono wa Ore no Mono ~Otto ni wa Misenai Midara na Kao o Otouto ni Sarasu Kyonyuu Wakazuma~ | r114256 | 2026-04-21 |
| Omae no Mono wa Ore no Mono ~Otto ni wa Misenai Midara na Kao o Otouto ni Sarasu Kyonyuu Wakazuma~ DVDPG | r153310 | 2026-05-19 |
| Omae no Mono wa Ore no Mono ~Otto ni wa Misenai Midara na Kao o Otouto ni Sarasu Kyonyuu Wakazuma~ Download Edition | r65963 | 2026-05-17 |
| Omae no Novel Game ga Kansei Shinai Riyuu - Download Edition | r147361 | 2026-05-08 |
| Omae no Onna o Netotteyaru ~Mukashi Yatta Onna wa Ima wa Hakui no Tenshi. Danna no Mae de Kokoro mo Shintai mo Moteasonde Netoru~ DVDPG | r32732 | 2026-05-20 |
| Omae no Onna o Netotteyaru ~Mukashi Yatta Onna wa Ima wa Hakui no Tenshi. Danna no Mae de Kokoro mo Shintai mo Moteasonde Netoru~ Package Edition | r24213 | 2026-05-17 |
| Omae no Pantsu wa Nani-iro da!? | r15939 | 2026-05-19 |
| Omae no Pantsu wa Nani-iro da!? | r151688 | 2026-04-21 |
| Omae wa Juujin Niku Benki ~Tanezuke Mugen Loop~ | r104073 | 2026-04-21 |
| Omae wa Juujin Niku Benki ~Tanezuke Mugen Loop~ Download Edition | r25585 | 2026-05-19 |
| Omakase! Obenkyou☆Sisters - Download Edition | r23636 | 2026-05-16 |
| Omamori: A MP100 Fangame - Demo | r114380 | 2026-04-21 |
| Omase na Princess ~Miwaku no Lolicon Nikubenki-tachi~ | r38011 | 2026-05-17 |
| Omatase! Janbaraya♪ - First Press Edition | r20593 | 2026-05-09 |
| Omatsuri Yarou | r77437 | 2026-05-19 |
| Omawari-san: Koitsu Desu. | r99013 | 2026-05-19 |
| Omega Vampire | r114829 | 2026-05-07 |