You can actually do the 2 Leaderboard achievements offline. You don't have to be connected to xbox live. My router died before I got those achievements, and I decided to do the hardware crack one on the leaderboards since it was fast just to see what happened. It gave me the cannot connect to leaderboards message, but I hit start game anyways. To my surprise, the achievement popped when I finished, even offline. I tried the leaderboard Ignition runthrough and it also popped. So this game can be done entirely offline.
Last edited by Sting7785; 01-03-2011 at 10:36 PM.