Marvel Avengers Alliance is a free to play 2D browser based TBS MMO game from Playdom.

"Avengers Alliance provides a combat role playing game experience with dozens of familiar Marvel superheroes and villains, including Spider-Man, Iron Man, Thor, Captain America, Wolverine, Hawkeye, Black Widow and many more. Once a hero is added to the Avengers team, players can begin training them to unlock unique abilities and attacks, as well as using "ISO-8" to further customize each character's stats. Players will also be able to face-off against each other, challenging their friends in super-powered, asynchronous PvP battles."

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