| PC/MS-Windows pack. |  Akolyta Model 1908770 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Akrivos Vip Model 2238230 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. |  Akuatica Demo Model 435090 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Akuatica Model 401330 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Akumi Wars Model 1961970 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Akurra Demo Model 1306960 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Akurra Model 1233070 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Akuto - Showdown Model 530130 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Akuya Model 545490 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Akyrikon VR Demo Model 1639360 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Akyrikon VR Model 1588590 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Al Andalus 711 - Epic History Battle Game Model 2016840 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Al Ankabut Model 1714500 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Al Emmo and the Lost Dutchman's Mine Demo Model 300130 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Al Emmo and The Lost Dutchman's Mine Model 296850 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Al Emmo's Postcards From Anozira Model 375020 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Al-Fine Model 545330 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Al-Qadim - The Genie's Curse Model 1904640 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alabama Bones Adventures Model 2051770 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Aladdin - Hidden Objects Game Model 1258480 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Aladdin - Save The Princess Model 1523170 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Aladin & The Enchanted Lamp Model 827100 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alakenisland Demo Model 2121140 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alakenisland Model 1927820 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alala - Wake Mi Up! Model 628820 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alaloth - Champions of the Four Kingdoms Model 919360 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alan - Rift Breakers Model 781120 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alan and The Kid Model 1767710 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alan Sharp Demo Model 1327270 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alan Sharp Model 1185360 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alan Wake Model 108710 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alan's Attitude Model 1158990 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alan's Automaton Workshop Demo Model 1551900 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alan's Automaton Workshop Model 1289990 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alas Astra Model 1361660 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alaskan Truck Simulator Demo Model 2000330 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alaskan Truck Simulator Model 849100 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Alba - A Wildlife Adventure Model 1337010 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Albacete Warrior Model 1605480 | 20?? | Steam Valve Corp. |
| PC/MS-Windows pack. | Albedo - Eyes From Outer Space Model 277520 | 20?? | Steam Valve Corp. |
