What is the most popular FPS video game?

 

Homefront: The Revolution 12 ( 0.97 % )
Battlefield™ 1 211 ( 17.06 % )
Half-Life 2 111 ( 8.97 % )
Call of Duty 4: Modern Warfare Remastered 222 ( 17.95 % )
Far Cry 4 201 ( 16.25 % )
Doom (2016) 131 ( 10.59 % )
Rainbow Six Siege 87 ( 7.03 % )
Far cry primal 160 ( 12.93 % )
Counter Strike Global Offensive 102 ( 8.25 % )