If you have played the game, you still have to do it to get certain weapons. Its mostly useless, except to get knife kills and get the Combat Knife medals. Also, once you get some of the more powerful knives, it does become a more viable combat option. If youre good at the target range, youll get the Scorpion. If youre having too many problems with the target range, come back when you get the AU Mod 300 R.

Without the kickback, hitting everything in time should be a breeze. NOTES: There are TONS of alternate routes to take on this mission, as there are numerous vents and doorways all over the place in the subways. In the corner to your left, near the dumpster, is a puddle of water, and above the dumpster is a ladder.

Jump up on the dumpster and climb the ladder. Follow s platform to a door.

Go in the door and shoot the lock to the door on your left. Basically, youre going on the other side of the large truck. Shoot the glass ahead of you and climb yourself up in to the mall. Shoot the guy that approaches you and go down the stairs.

Yet a third guy comes from the right a ways up. Take him out and go right where he came from.

Ignore the C4 trigger man. Get a sample from the water fountain on your left. Hug the left side of the mall here to avoid the C4 blast, then kill the trigger man. Run past the trigger man and head up the stairs. Shoot the glass and kill the 2 guys behind the fountain. Take both enemies out to rescue these 2 officers. Run back outside and collect sample from the water fountain. Facing the fountain, turn left and go into the door.

Decontaminate, enter, and roll right to stun jack the CHA officer. Crawl through the pipe, pop out, then head forward to the end here and crawl through the pipe on your left to the next area. Run back and make a right turn into the open area. Flip on the power generator.

Go back to scan the sample. You now have 1 minute to protect baddies from shooting up the power generator. They mostly come from the roof to the left of the generator. If you want, you can leave when there is 10 seconds left on your countdown. Head left back towards scanner, but roll in the nearby tube on the wall instead. In the new area, theres another officer. Shoot everyone that shows up until he is saved, then make your way to the opposite end of this area.