Mytheon was a game in development from Petroglyph Studios that sought to blend MMORPG action with strategy elements. The game, which was intended to be free-to-play and microtransaction supported, was based on Greek and Egyptian Mythology, and revolved around a system of Power Stones, which could be used in many ways to customize characters, powers, and strategy.

Mytheon also contained more traditional RPG elements such as hunting, quests, customization and other methods of leveling through XP gain. There were three classes available, including the Warcaster, Elementalist, and Eidolon. Players could earn new gear and new stones for their characters as they grew in levels. PvP was also available in one-on-one duels or in mass arena mode. Mytheon was shut down in 2011.