Revenge of the Titans is a tower defense/real-time strategy video game developed and published by Puppy Games. It was released for one of the five games included in the second Humble Indie Bundle in 2010. As a result of the success of the Humble Indie Bundle sale the source code of Revenge of the Titans was released. On March 16, 2011, the game was released on Steam. The game received positive reviews from critics, who commended its art style, gameplay, and writing.