The ranking was created with an algorithm that looks at the players PSN piles and which trophies a player got. Thus, the algorithm can not only determine the number of players but also go back in time and show when the game had as many owners. The reference value is 357 million PSN accounts.
14 Most Popular PlayStation Games
14. Grand Theft Auto IV
It starts with Grand Theft Auto IV by Rockstar on the PS3. The game has 35.7 million players.