Congrats, I have: 1520 of 1750 for Halo 3, and 750 of 1000 for ODST =/ I should try and get as many of the Halo 3 achievements as I can, as Halo 3 multiplayer begins toning down when Reach comes out, for ODST it isn't as bad but still. Missing most of the Vidmasters, and Legendary/Mythic achievements. The big factor for me with ODST is the Audio Log achievements and several firefight, including all of the 200k point ones. Hopefully I can find a power cable for my Xbox soon since there is a month and a half before Reach releases. Cheers :) The chasm ten one is getting annoying now, my friends who i did all the other firefight achievements already have it, and my twin (whos normally pretty good to do it with) keeps on failing, we can never get past set 1, and last time, for my 4 deaths he had 9 >.< (and 4 is pretty bad anyway normally!). I would do it myself but chasm 10 is just so big its pretty ridiculous. Im just gonna have to beg my friends to do it with me, but i just wanna have all the achievments now :( Edit: Done chasm ten now, 1750 on halo 3 and 1000 on odst!