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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Every Halo game. Ever. Except Wars since you don't really get to see the sky. Bungie excels at skyboxes and even 343i did a good job with them. I think there's something secret in Sage's beard that allows him to make such good ones. Possibly space magic of some kind.