Titan Quest: Immortal Throne is an expansion for the action role-playing game Titan Quest, released in 2007. It introduces new content, including additional quests, enemies, and items, while expanding the game's storyline to include the Underworld and the realm of Hades. Players can explore new areas and face challenging foes as they continue their journey through ancient mythology. The expansion also adds a new character class, the Dream Mastery, allowing players to combine skills from different classes for unique gameplay experiences. With enhanced graphics and improved gameplay mechanics, Immortal Throne enriches the original game, providing fans with more depth and adventure.