| PC/MS-Windows pack. |  3D Puzzle - Modern House Model 1885090 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3D Puzzle - Old House Model 1873990 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3D Puzzle - Vintage House Model 2388390 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3D Puzzle - Wood House Model 1912700 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3D Text Adventure 2 Model 1154540 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. |  3D Text Adventure Demo Model 1085100 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3D Text Adventure Model 1083700 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3D Tower Model 745670 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3D Ultra Minigolf Adventures Deluxe Model 10140 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3DCoat Modding Tool Demo Model 816950 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3DMark 11 Demo Model 221870 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3DMark Demo Model 231350 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3DMark Vantage Demo Model 221850 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3dSen Model 1147940 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3dSenVR Demo Model 954290 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3dSunshine Model 513760 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3Gun Nation VR Model 1006700 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3on3 FreeStyle Model 624910 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3rd Annual Saxxy Awards Model 261310 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3rd eye Model 1131900 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3rd Invasion - Zombies vs. Steel Model 1016100 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3XO Character Editor Demo Model 2344810 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3ZENTREE - 3D NODE BASED INFORMATION SYSTEM Demo Model 1333960 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 Alice - Lorange Journey Model 761160 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 days in *** Model 2348330 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 Elements Demo Model 47010 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 Elements Model 47000 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 for the Money Demo Model 772160 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 Minutes to the Apocalypse Model 1269700 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 Months of You Model 1705880 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 Seasons Girls Model 1914020 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 Seasons Runner Model 2328110 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 Stones Model 1058400 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 The Elements Demo Model 2125290 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 The Elements Model 2081090 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 Witch Seasons & Convenant Demo Model 1532540 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4 Witch Seasons & Convenant Model 1532400 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 4/20 Massacre Model 922260 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 40 Days Model 737600 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 40 Winks Model 778080 | 20?? | Steam Valve Corp. |
