| PC/MS-Windows pack. |  3 Minute Heroes Model 1475460 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3 Minutes to Midnight Model 832500 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3 O'clock Horror Model 1683070 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3 on 3 Super Robot Hockey Model 988080 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3 Stars of Destiny Model 278530 | 2014 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3 Tactical Lines Model 1523500 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3 Triplets, 18 Tits Model 2360160 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3, 2, 1, Survive ! Model 864190 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3..2..1..Grenades! Model 504090 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. |  30 Birds Demo Model 1878130 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30 Birds Model 1708770 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30 Days Another Demo Model 2359670 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30 Days Another Model 2125870 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30 days in red army Model 1995220 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30 days of plague Model 1260240 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30 Days to be the Best Model 1908490 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30 days to survive Demo Model 1340190 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30 days to survive Model 645270 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30 minutes to die Demo Model 2132290 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30 seconds to jail Model 817770 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30-50 Feral Hogs Model 2215590 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 300 Dwarves Model 301730 | 2014 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3000th Duel Model 1098080 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3001 - A Milf Odyssey Model 2271750 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 300k - The Game Model 1344570 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 303 Squadron - Battle of Britain Model 675170 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3030 Deathwar Redux - A Space Odyssey Model 464360 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 307 Racing Model 2240780 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3079 - Block Action RPG Model 259620 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 3089 - Futuristic Action RPG Model 263360 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30XX Very Pre-Alpha Demo Model 1328080 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 30XX Model 1029210 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 31st prototype Model 1597470 | 2021 | Steam Valve Corp. |
| PC/MS-Windows pack. | 32 in 1 Game Special Model 2132510 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 33 Rounds Model 1194620 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 34Everlast Model 2134470 | 2023 | Steam Valve Corp. |
| PC/MS-Windows pack. | 3571 The Game Model 723020 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 35MM Model 466500 | 2016 | Steam Valve Corp. |
| PC/MS-Windows pack. | 36 apples Model 1202480 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | 36 Fragments of Midnight Model 679930 | 20?? | Steam Valve Corp. |
