| PC/MS-Windows pack. |  Acretia Tactics Demo Model 2164380 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. |  Acro Fs Model 834880 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Acro Storm Demo Model 563770 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Acro Storm Model 546610 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Acron - Attack of the Squirrels! Model 1094870 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Acronia Model 2292350 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Acrophobia Model 851960 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Acropolis - The Archaic Age Model 955670 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across Demo Model 1576940 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across Killzone Model 1533610 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across The Globe Model 2123020 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across The Grooves Model 957820 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across The Line Model 491800 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across The Line Model 823680 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across the Obelisk Demo Model 1421400 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across The Obelisk Model 1385380 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across The Rhine Model 329620 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across The Valley Model 2210020 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across The Void Model 2406120 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across The Wilds Model 2284840 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across Model 1518870 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across Model 547740 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Across-Stitch Model 2188220 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Acrossflash Model 523570 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Act of Aggression Model 318020 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Actala - The Hero's Shadow Demo Model 2148440 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Actala - The Hero's Shadow Model 2148070 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action - Vengeance Model 2099940 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Alien Model 382080 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Arcade Wrestling Model 1072100 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Ball 2 Model 1186340 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Ball Demo Model 1875690 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Ball Model 1837160 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Card Football Model 848470 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Commando 2 Model 1646820 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Commando Model 1616690 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Entities Model 1046490 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Figures - Nitro Circus Model 791510 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Henk Model 285820 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Action Legion Model 431630 | 20?? | Steam Valve Corp. |
