Gamers can play online as superheroes from the Marvel Universe, such as the Hulk, in the game called "Marvel Heroes" at Marvelheroes.com. Players can create superhero characters to play online beside DC superheroes in the game called "DC Universe Online" at DCuniverseonline.com.
"Marvel Heroes" is a free-to-play massively-online-multiplayer action game. Players collect their favorite superheroes gradually. They get to play as their collected superheroes in the game story to stop the villain, Dr Doom. "DC Universe Online" is also a free-to-play massively-online-multiplayer action game. Unlike in "Marvel Heroes," players in "DC Universe Online" can choose to join the game either on the side of the heroes or on the side of the villains.