Titan Quest is an action role playing hack and slash video game developed by Iron Lore Entertainment for Microsoft Windows personal computers. It was published by THQ in 2006. It was released on Steam in 2007, and later ported to mobile devices by DotEmu and released in 2016; later versions were published by THQ Nordic. Versions for PlayStation 4, Xbox One and Nintendo Switch were released in 2018. The story follows a player-created protagonist as they navigate Ancient Greece, Egypt and China on a quest to defeat the Titans after they escape from their ancient prison. The gameplay is similar to the Diablo series, with player navigation being handled with a mouse-driven tile-based interface, and gameplay revolving around role-playing mechanics and real-time combat. Three expansions were released for the game: Titan Quest: Immortal Throne in 2007, Titan Quest: Ragnarök in 2017 and Titan Quest: Atlantis in 2019.