| PC/MS-Windows pack. |  Agrou Model 1305420 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | AI Shoujo Model 1250650 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Air Wars Model 1210930 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Airborne - Trials Model 1115110 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Akai Noroi Model 880800 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Aker Fern Model 1344840 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alder's Blood - Definitive Edition Model 820020 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alder's Blood - Prologue Model 1227260 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alice in Wonderland - A Jigsaw Puzzle Tale Model 1446280 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alien Shooter - Last Hope Model 951530 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alien Shooter 2 - The Legend Model 1007400 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Allblack Phase 1 Model 1134450 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Almost My Floor - Prologue Model 1395230 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alpha Version.0 Model 359970 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alt254 Model 1341720 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Always Down Model 1101800 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Amazing Cultivation Simulator Model 955900 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Ambient Channels Model 1437680 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Amnesia - Rebirth Model 999220 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Angel Sex Pet Model 1474100 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Angels of Death Episode.Eddie Model 1321230 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Angkor - Celebrations Model 1306110 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Angry Video Game Nerd I & II Deluxe Model 1162960 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Animal Rescuer - Prologue Model 1428610 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anime - World War II Model 1159640 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anime Artist 2 - Lovely Danya Model 1221800 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anime Artist 3 - Harem Model 1458590 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anime Desktop Girls Model 1381200 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anime Redemption Model 1192610 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anime Standing Model 1253870 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anime Studio Tycoon Model 1217340 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anime War — Modern Campaign Model 1234190 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anime World Model 1396380 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Annie - Last Hope Model 1174390 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anno 1404 - History Edition Model 1281630 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Annoying ball game Model 1383480 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anomaly Hunter - Prologue Model 1077740 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Ante Model 1434270 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Apparitions - Kotsmine Hills Model 1305880 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Apprehend:Girlfriend Model 1249500 | 2020 | Steam Valve Corp. |
