Top games by current player count
Current Players Peak Today   Game
 
344,777 893,125   Dota 2
215,033 589,799   Counter-Strike: Global Offensive
49,714 59,366   Team Fortress 2
48,731 68,537   XCOM 2
41,055 51,027   Sid Meier's Civilization V
34,893 50,109   ARK: Survival Evolved
33,894 41,047   Garry's Mod
32,151 50,853   Rocket League
31,999 36,346   Warframe
31,113 38,179   Fallout 4

Steam Hardware & Software Survey
Steam Stats