If anyone’s interested, I’d like to get the “Be Like Marty” achievement in Halo 3: ODST as I’m going for a full achievement list in that game and it’s one of the few I’m missing. The achievement is as follows:
In Firefight, finish a full round without killing a single enemy.
Cant offer help at the moment but a tip if you have an extra controller set that up with the account you want to earn the achievement on and have it be afk. Then use your second controller and get the kills with this spare account giving you the achievement. Its how I helped my brother do it while he was gone.