| PC/MS-Windows pack. |  23UL Model 1192630 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 2D Platformer Game (Toy Factory) Model 1570790 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 2econds to starlivht - My Heart's Reflection Model 1479030 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3 O'clock Horror Model 1683070 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3 Tactical Lines Model 1523500 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 31st prototype Model 1597470 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3D Double Dealing Character Model 1499030 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3D Hentai Puzzle 2 Model 1623340 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 41 Hours - Prologue Model 1536830 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 4Prot Model 1632020 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 4th & Inches Model 1544720 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 6 Feet Behind Model 1557760 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 8Doors - Arum's Afterlife Adventure Model 668550 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 9-nine-: Episode 4 Model 1424660 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | A Conversation With Mister Rabbit Model 1556610 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | A Nerd who has sex with girls in Another world has become a HERO Model 1581250 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | A Random Maze Model 1164100 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | A Total War Saga - Troy Model 1099410 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | A Winter Story Model 1751310 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Abandoned Croxon Mansion Model 1661380 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Abandoned Model 1735120 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Abarenbo Tengu & Zombie Nation Model 1603920 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Absurbia - A Trashy Satire of Suburban Outcries Model 1506480 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Academy of Magic - Dark Possession Model 1663940 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Academy of Magic - Lair of the Beast Model 1557710 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Academy of Magic - The Great Dark Wizard's Curse Model 1778770 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | ACIIIIIIIIIIIIIIID Model 1623380 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Acolyte - Prologue Model 1333530 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Across the demon realm 2 Model 1565990 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Across the demon realm Model 1528290 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Adamanta View Model 1821910 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | ADD Model 1564080 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Adult Puzzles - Camgirls Model 1780780 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Adventure Mosaics. Granny's Farm Model 1597870 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Adventure War - Battlefield Model 1514100 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | AE86 Eurobeat drift Model 1675100 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Aeos - The 18 Plus Nsfw Adventure Generator Model 1647010 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Aery - A Journey Beyond Time Model 1503920 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | AFK Summoner Model 1739970 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | Afterlife - FPS Horror Shooter Model 1619590 | 2021 | Steam Valve Corp. |
