Recently Steam sales were released. They include players who have launched a game which has developer-set achivements, so the list is not full.
Cities: Skylines 6,132,366
Magicka 4,976,290
Crusader Kings II 3,170,312
Europa Universalis IV 1,983,657
Stellaris 1,967,015
Hearts of Iron IV 1,352,834
Pillars of Eternity 1,275,530
Magicka 2 857,543
Age of Wonders III 764,290
Tyranny 562,631
Teleglitch: Die More Edition 453,247
Cities in Motion 2 451,407
BATTLETECH 289,619
Cities in Motion 237,970
https://arstechnica.com/gaming/2018...-precise-player-count-for-thousands-of-games/
Cities: Skylines 6,132,366
Magicka 4,976,290
Crusader Kings II 3,170,312
Europa Universalis IV 1,983,657
Stellaris 1,967,015
Hearts of Iron IV 1,352,834
Pillars of Eternity 1,275,530
Magicka 2 857,543
Age of Wonders III 764,290
Tyranny 562,631
Teleglitch: Die More Edition 453,247
Cities in Motion 2 451,407
BATTLETECH 289,619
Cities in Motion 237,970
https://arstechnica.com/gaming/2018...-precise-player-count-for-thousands-of-games/
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