Top games by current player count
Current Players Peak Today   Game
 
571,845 988,816   Dota 2
176,865 584,387   Counter-Strike: Global Offensive
38,127 70,734   Team Fortress 2
37,668 98,969   Total War™: WARHAMMER®
31,859 69,908   ARK: Survival Evolved
31,433 64,351   Sid Meier's Civilization V
24,677 51,892   Fallout 4
21,647 51,320   Garry's Mod
21,470 42,403   Warframe
18,490 61,596   Football Manager 2016

Steam Hardware & Software Survey
Steam Stats