1. The Sneak Attack is done by having a large group of troops fight in the corridor and a small group of jetpack troopers get on top of the corridor. The jet troopers then jump off the side of the corridor and use their jet packs to hover just outside one of the windows and then unload fire on your unsuspecting enemies. Attacking from both sides works better but requires another human ally. 5. Snipers are a great way to take out enemies from anywhere in this map. I highly recommend sniping to reduce losses.