| PC/MS-Windows pack. |  Comic&Picture Shelf Model 1352750 | 202? | Steam Valve Corp. |
| PC/MS-Windows pack. | ComputerKeyboard Model 2238270 | 2022 | Steam Valve Corp. |
| PC/MS-Windows pack. | Construct 2 Business Model 228000 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Construct 2 Free Model 227240 | 2013 | Steam Valve Corp. |
| PC/MS-Windows pack. | Construct PRO Model 941800 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Content Creator Tool Model 2136920 | 2022 | Steam Valve Corp. |
| PC/MS-Windows pack. | Controller Companion Model 367670 | 2015 | Steam Valve Corp. |
| PC/MS-Windows pack. | Controllers Battery Indicator Model 775820 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | ControlMyJoystick Model 773210 | 2018 | Steam Valve Corp. |
| PC/MS-Windows pack. | ControlRoom Model 1172290 | 2020 | Steam Valve Corp. |
| PC/MS-Windows pack. | Coppercube 5 Model 364970 | 2015 | Steam Valve Corp. |
| PC/MS-Windows pack. | Coppercube 6 - Game Engine Model 857350 | 2018 | Steam Valve Corp. |
| PC/MS-Windows pack. | CoreOptimizer Model 910370 | 2018 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cpucores - Maximize Your FPS Model 384300 | 2015 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cross Racing Championship Extreme - Modding tools Model 980000 | 2018 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cryengine Sandbox Model 304220 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cryengine Model 220980 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | Cur3d Viewer - Steam Edition Model 1929750 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CV Maker For Mac Model 461530 | 2017 | Steam Valve Corp. |
| PC/MS-Windows pack. | CV Maker For Windows Model 438110 | 2016 | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink ActionDirector 3 Model 501610 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink AudioDirector 12 Ultra Model 1688060 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink AudioDirector 6 Model 435740 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink AudioDirector 8 Ultra Model 679580 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink ColorDirector 4 Model 435750 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink ColorDirector 6 Ultra Model 679590 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PhotoDirector 12 Ultra Model 1359770 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PhotoDirector 13 Ultra Model 1688050 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PhotoDirector 14 Ultra Model 2115640 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PhotoDirector 7 Ultra Model 425550 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PhotoDirector 8 Deluxe Model 501600 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PhotoDirector 8 Ultra Model 501640 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PhotoDirector 9 Ultra Model 679550 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink Power2Go 10 Platinum Model 425560 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PowerDirector 14 Ultimate Suite Model 471580 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PowerDirector 14 Ultimate Model 438840 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PowerDirector 14 Ultra Model 355030 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PowerDirector 15 Ultimate Model 501620 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PowerDirector 15 Ultra Model 501630 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | CyberLink PowerDirector 16 Ultimate Model 679570 | 20?? | Steam Valve Corp. |
