Top games by current player count
Current Players Peak Today   Game
 
478,121 877,970   Dota 2
450,908 555,426   Counter-Strike: Global Offensive
54,046 55,304   Football Manager 2016
46,428 55,006   Team Fortress 2
42,816 49,672   DARK SOULS III
40,799 44,660   ARK: Survival Evolved
39,718 40,400   Sid Meier's Civilization V
37,938 46,296   Rocket League
33,911 36,687   Garry's Mod
32,409 32,409   Rust

Steam Hardware & Software Survey
Steam Stats