Top games by current player count
Current Players Peak Today   Game
 
1,015,119 1,137,360   Dota 2
446,330 689,174   Counter-Strike: Global Offensive
61,703 81,022   Team Fortress 2
59,051 73,217   Grand Theft Auto V
50,914 67,385   Football Manager 2016
49,996 75,742   XCOM 2
45,033 73,327   Sid Meier's Civilization V
43,105 58,403   Rust
41,590 62,394   ARK: Survival Evolved
37,153 64,738   Garry's Mod

Steam Hardware & Software Survey
Steam Stats