| PC/MS-Windows pack. |  Agent A - A Puzzle in Disguise Model 801480 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Awesome Model 345220 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Cat Model 632150 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Emerson Model 1207030 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. |  Agent in Depth Demo Model 2163980 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent in Depth Model 2096080 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Intercept Model 1502710 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Klutz Demo Model 1560030 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Klutz Model 1422910 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Lovesdick Demo Model 1096820 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Lovesdick Model 1054470 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Murphy Model 1518200 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent of Chaos Model 1486270 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent of Love Model 1013830 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Origins Model 534110 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Roswell - Tactics Demo Model 1826670 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Roswell Demo Model 1317350 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Roswell Model 931320 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Roy - Zombie Hunt Model 2274800 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Simulation Demo Model 1722950 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Simulation Model 1708050 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Stilus Model 1838080 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Team Simulator Model 2233980 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent Walker - Secret Journey Model 497580 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent X Model 1506420 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent-00 Model 1299580 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agents of Aggro City Online Model 658420 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agents of Mayhem Model 304530 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agents of the Outcaste Model 1457360 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Ages of Cataria Model 1634390 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Ages of Conflict - World War Simulator Model 2186320 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Ages of Mages - The Last Keeper Model 820610 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Aggelos Model 717310 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Aggregate Core Model 2432900 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Aggregator Elevator System Model 2226610 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Aggressive Robot Vacuum Model 1479050 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Aggressor Model 1619790 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agile Firefighter Model 2071460 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agni Fighter Model 2267680 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Agonize Model 1609570 | 20?? | Steam Valve Corp. |
