Marvel Super Hero Squad Online was a massively multiplayer online game for younger audiences based on the Marvel Super Hero Squad, developed by American video game companies The Amazing Society and Gazillion Entertainment. The open beta version of the game was released on April 29, 2011 (although a closed beta was released in early 2011). It was a free-to-play game that supported both microtransactions of its in-game currency and a monthly subscription. Marvel Super Hero Squad Online was shut down on January 11, 2017. Gazillion Entertainment itself shut down on November 22, 2017.