Statistics for Most Played Games On Steam Ever

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All-Time Player Estimate	Game	% Correct
46,305,966	Counter-Strike: Global Offensive	61%
50,191,347	Team Fortress 2	49%
12,604,123	Grand Theft Auto V	47%
9,971,481	Portal	39%
36,604,134	PLAYERUNKNOWN'S BATTLEGROUNDS	35%
13,062,700	Portal 2	32%
18,576,379	Garry's Mod	24%
10,110,342	Rocket League	23%
13,132,545	Terraria	23%
15,001,876	Counter-Strike: Source	20%
13,235,488	The Elder Scrolls V: Skyrim	17%
23,143,723	Left 4 Dead 2	13%
16,332,217	Warframe	8%
12,701,498	Sid Meier's Civilization V	7%
18,643,807	PAYDAY 2	6%
14,371,946	Paladins	5%
11,218,936	Borderlands 2	4%
27,381,399	Unturned	4%
9,536,732	War Thunder	2%
10,145,493	Robocraft	1%