Instructions
Last Zombie Points
Kill all but one zombie.
Throw a grenade near the last zombie. Don't kill him, but wound him so he begins to crawl.
Run through the level fixing the barriers. The crawling zombie will not be able to keep up with you.
Shoot the crawling zombie.
Flamethrower
Go to the hell room.
Go to the box with the question mark on it.
Wait for the question mark to turn light gold.
Open the box. You will receive the flamethrower.