Immortal: Unchained is an action role-playing game and third-person shooter with a high difficulty level and a focus on firearm combat, though basic melee weapons such as swords, axes, and clubs are also available. Enemies have critical weak points, typically the head and a glowing spot on their backs, that can be targeted for extra damage. The game is set in an alternate universe whose backstory draws on Norse mythology, spanning Nine Realms tied to a central artifact called the Monolith.