I really did have my concerns for Titanfall's aesthetics after the beta (Both Fracture and Angel City were pretty bland looking), but then the full game blew me away in this department. Especially outpost 207 and Demeter.
Post nice lookingSkyboxes I guess
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I always loved the Northern Lights in Skyrim. Every Halo games has had breathtaking sky boxes as well, but I'm guessing you all knew that.