Just out of curiosity, how are you approaching the game? Are you just replaying certain parts of certain games, every game in it's entirety, going after every possible achievement, and trying to get all the in game unlockables (Halo 3 & ODST - done, Reach, only 2 more sections to go, Halo CE:A not quite 1/3 done)? I just finished the Halo 3 & ODST unlockables this weekend, and having to do Firefight matchmaking again was actually kinda fun. Being server based makes is SO MUCH better than it was back on original release. I've been working on it again the past few months and have a 105%(?, maybe 106-107 now) achievement completion, with doing no multiplayer since it first came out, and only sparingly then. I have the majority of each games achievements completed, leaving a few I will never attempt (LASO, Annual, Deja Vu), and a handful of campaign ones that I still may be able to complete, but may require running co-op to do so (Halo 2 and 4 par scores are a pain). How and what are you doing on it? Any goals? Any parts that you just don't seem able to complete?