(1) This level is identical to the previous powerup level. This time, though, you start at what was the exit door in the other level.
(2) Run straight forward past another corridor on the right and blow the left crate to get the auto-map and a med kit. Keep moving: the next 2 crates hold grenades.
(3) Reverse your route and move down the corridor you skipped earlier (the crate to the right is empty). Straight ahead is body armor and 2 clips, but more body armor is available closer to the other powerups so stay left to a barrier of crates. Blow them all and grab the 5 derm patches; the single crate in front of the barrier holds a shotshell.
(4) A single seismic charge and 2 shotgun shells are at the end of the short corridor to your left; the crate you pass on your way yields a med kit.
(5) Go back and turn left where the derm patches were. The right crate holds a shotshell and the left crate a derm patch and med kit. Turn left past that last one and blow the 2 crates ahead for another derm patch and (some of the time) a smartgun.
(6) Reverse your route and stay left for a single derm patch crate and, in a small alcove to the left just past it, a hypo pack and body armor.
(7) Keep going past the alcove. If you need flame thrower fuel, there are 3 canisters plus a flamer to the right when you hit the T junction. Turn left instead and the next 3 crates hold a med kit, a pulse rifle clip, and nothing. You won't get this far, but the next 2 yield a shotgun and night vision goggles. If you are pretty low on pulse rifle ammo you can keep moving forward after grabbing the grenades to the next 3 crates for a pulse rifle and 2 magazines; the fourth crate holds a med kit. The section of corridor between the last junction and the exit door holds 3 crates. The first 2, right next to each other, hold 1 shotshell and 1 smartgun magazine each. The last crate, a little short of the exit door, contains an adrenaline burst. Adjust your route for what you need most.