#12 League of Legends
Developer: Riot Games
Released: 2009
Revenue: $3.59 billion
Riot Games’ iconic MOBA, and one of the leading e-sports games in the world, comes in at #12. Not bad for a game that primarily sells character skins (as opposed to items that could give players an advantage in the game). League of Legends only continues to grow in popularity, with its player count reaching 100 million active monthly players as of the middle of last year; a whole world to toy with.