| PC/MS-Windows pack. |  9-nine-: Episode 1 Model 976390 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | 996 - De zhenshi laoban pian Model 1086470 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | 9Dragons - Kung Fu Arena Model 956580 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | ::CallBack Model 985930 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | >Connect Model 1162950 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | A Story of Us ep. 1 - First Memories Model 1026810 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | ACardShooter Model 1076770 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Accel Model 994260 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Ace Combat 7 - Skies Unknown Model 502500 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | ACES - Area Cooperation Economic Simulation - North Korea Model 1004350 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Achievement Collector - Dog Model 1008370 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Achievement Collector - Zombie Model 1009300 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Acting Lessons Model 1045520 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Action - Source Model 977050 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | ADM 2 - When worlds collide Model 1082780 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Adventure in King Caries Land Model 1057150 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Afterlife Model 1012370 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Age of Darkness - Die Suche Nach Relict Model 1033090 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Age of Fear - The Free World Model 882410 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Age of Fear - The Undead King GOLD Model 832770 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Agent 00111 Model 1077760 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Ahegal Seasons Model 1106860 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | AI - The Somnium Files Model 948740 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Air Battlefront Model 1067560 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Aira VR Model 1003230 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alex Hunter - Lord of the Mind Model 1120800 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alia's carnival! Model 1094530 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alilia Model 1047680 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | All That Remains - A Story About A Child's Future Model 1111610 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alpha Model 1171880 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alt-Frequencies Model 1035050 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alternate DiMansion Diary Model 1015720 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Alternate Jake Hunter - DAEDALUS The Awakening of Golden Jazz Model 836600 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. |  Alternate Jake Hunter - DAEDALUS The Awakening of Golden Jazz Model 890990 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Amber's Airline - 7 Wonders Model 1029860 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Amid Evil Model 673130 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Ancient Battle - Alexander Model 1025520 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Ancient Battle - Successors Model 1025510 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anima Model 917830 | 2019 | Steam Valve Corp. |
| PC/MS-Windows pack. | Anime Artist Model 1101270 | 2019 | Steam Valve Corp. |
