DC Universe Online

DC Universe Online is a free to play video game. It has around 18 million users worldwide.
Reception.
DC Universe Online received good reviews. It receive a grade of 7/10 from IGN. The rating further improves to 8/10 after its PlayStation 4 launch.
As of August 2014, the game has 18 million registered users. On gaming platforms PlayStation 3 and 4, the game is free of charge to play. It is the highest profit earning game on those platforms.