Might be a little too late, but to anyone having trouble, remember to run from enemies. This is a horror game, you aren't always supposed to kill everything. And make sure not to waste any health items.
Completed Retail: NBA 2K6, Call of Duty 2, Resident Evil 5 (1000), History Channel: Civil War, MW2, SH: Homecoming, Tetris Evolution, Bioshock (1100), Bioshock 2 (1000), Fallout 3 (1550), Halo Reach (1000), Fallout: NV (1000). Completed Arcade: Gunstar Heroes, Galaga, Pac-man CE, DR2:CZ, Harm's Way, Doritos Crash Course, Doom, Small Arms. 40,000 GS on 9/03/11