Halo, but that's mostly resting on Bungie's laurels. I respectfully disagree about 343 doing a great job, IMHO it's been a walking calamity since they took over. H4 was the only title I disliked, and MCC wasn't what I was interested in. However, I'm guardedly optimistic for Halo 5, though. They've learned a lot since they took over, and it could be promising.