Doom: The Dark Ages introduced semi open-world areas of the kind found many Halo games. The first of these appears in “The Siege Part One,” which is the sixth mission in the game.Read More: Doom: The Dark Ages: The Kotaku ReviewThroughout the game,

You can hop into DOOM: The Dark Ages right now, if you're shelling out extra for the Premium Edition. id Software's fantasy-tinged first-person shooter DOOM: The Dark Ages is now available, at least for those that are paying more for the Premium Edition of the game.

When is Doom The Dark Ages set? Not the dark ages, oddly, as we'll explain in this spoiler-free guide to the Doom timeline