Top games by current player count
Current Players Peak Today   Game
 
828,477 1,080,658   Dota 2
323,520 605,131   Counter-Strike: Global Offensive
46,993 99,424   XCOM 2
45,644 62,274   Team Fortress 2
42,525 52,129   Grand Theft Auto V
39,070 73,404   Football Manager 2016
32,993 53,453   Rust
31,330 56,595   Sid Meier's Civilization V
27,724 53,214   ARK: Survival Evolved
26,026 46,464   Garry's Mod

Steam Hardware & Software Survey
Steam Stats