
Something's afoot in Marathon, as Bungie's new FPS is leading players toward the trickiest map to date. A mysterious new area has been added to the menu, indicating the ongoing ARG will soon be ending, letting people into the Cryo Archive.
Made up of seven disparate puzzles, diehard Marathon-ers have been gradually solving each layer to unlock the next, with the seventh leading us to this fourth map. In classic Bungie fashion, these have been relatively esoteric challenges to work out, and actually getting properly started required a hint from the devs.