I was replaying the Call Of Duty 4 mission where you sneak around with the sniper rifle and it made me think about the sniper training missions in America's Army: RISE IF A SOLDIER, for the origional xbox. if you never played the game, one of the training missions is you have to sneak around this training site and you have 30 minutes to get intel where towers and vehicles are and you have to pick up several journals that are being watched by patrol then get to the checpoint all without being spotted and you have to do it all without firing a shot. It took me about almost 12 ingame hours to get a perfect on it. And if you get through that you unlock the next traing misson where you wait for a target that can show up anytime in the next 48 hours. Thats right you must be able to dedicate a maximum of 48 REAL HOURS! And if you didn't get the target, you have to restart the mission. So can any of you think of a game with a more grueling training mission (or any mission at that) than that?