Top games by current player count
Current Players Peak Today   Game
 
780,920 893,125   Dota 2
575,204 594,657   Counter-Strike: Global Offensive
58,526 58,607   Team Fortress 2
56,954 74,648   XCOM 2
53,428 68,666   Football Manager 2016
52,162 57,385   Grand Theft Auto V
46,532 48,267   Rust
45,989 50,335   ARK: Survival Evolved
44,434 51,126   Sid Meier's Civilization V
40,181 41,817   Garry's Mod

Steam Hardware & Software Survey
Steam Stats