| PC/MS-Windows pack. |  Conquest Emperor Model 1934930 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Console Simulator Model 1486910 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Construction Manager Model 1896000 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Controller Sync Model 2075820 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Controller Model 2257680 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Core-Blast Model 1721550 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cornucopia Model 1681600 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Corponation - The Prologue Model 2410980 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Corsair's Madness Prologue - Jungle's Island Model 2190570 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Covid Killer Model 1917020 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Crossroad of Worlds - Mirrors to Other worlds Collector's Edition Model 2322720 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Crossroad of Worlds - Mystery Agency Collector's Edition Model 2244330 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Crossroads - Escaping the Dark Model 2362350 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cruise Ship Manager - Prologue - Maiden Voyage Model 2251420 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cruise Ship Manager Model 1730240 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Crystal Story - Dawn of Dusk Model 1746590 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Crystal Tales Tactics - Echoes of the Libertas War Model 1829850 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cuberun Model 2334390 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cursed House 1 Model 2375420 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cursed House 10 Model 1815430 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cursed House 11 Model 2119960 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cursed House 12 Model 2404900 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cursed House 9 Model 1552090 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cursed Model 2208160 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberThreat Model 1395040 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberTown - Prologue Model 2260060 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberTown Model 1535520 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Dead Age - Survivors Model 2117160 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Dead Island Riptide JP Model 240220 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Dead Space Model 1693980 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Deadlink - Combat Shell Trial Model 2370510 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Deadlock Station Model 2327640 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Deluge - Sermon for the Dead Model 2186980 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Delusion Model 2203530 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Delusion Model 400390 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Dig Dig Boom Model 2026040 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Digital Eclipse Arcade: Invasion of the Buffet Snatchers Model 2217800 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Digital Eclipse Arcade: Jollyball Model 2237440 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Digital Eclipse Arcade: Q.P.I.D. Model 2309240 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Doki Doki First Love Club Model 1640660 | 2023 | Steam Valve Corp. |
