Top games by current player count
Current Players Peak Today   Game
 
372,563 1,013,674   Dota 2
298,713 591,274   Counter-Strike: Global Offensive
72,574 85,601   XCOM 2
51,298 70,594   Football Manager 2016
46,398 54,120   Sid Meier's Civilization V
44,765 60,554   Team Fortress 2
41,469 51,978   ARK: Survival Evolved
37,464 51,783   Rust
35,538 40,801   Fallout 4
35,326 44,319   Garry's Mod

Steam Hardware & Software Survey
Steam Stats