Top games by current player count
Current Players Peak Today   Game
 
928,746 1,094,007   Dota 2
327,377 651,028   Counter-Strike: Global Offensive
75,423 130,183   XCOM 2
57,073 79,396   Team Fortress 2
42,793 62,024   Grand Theft Auto V
39,640 72,996   Sid Meier's Civilization V
36,069 66,924   Football Manager 2016
36,062 57,747   Rust
33,827 57,532   Fallout 4
32,220 59,358   ARK: Survival Evolved

Steam Hardware & Software Survey
Steam Stats