Objective: Repair (activate 2 switches).
You arrive near an ancient Alien underground site...
First kill the aliens around you, then grab the ammo, recharge and save. In the adjacent room, there are three large crates with a little ammo on top of them. If you're competent, go get 'em; if you aren't, head on to the small corridors ahead. The side-corridors have no importance to you yet, but get rid of the monsters there anyway, as there's some ammo stashed there too. Use the elevator at the north end of these corridors to reach switch 1, which will open door A. Jump down into the dark area, and go north. Follow the corridors there until you reach a junction, from where you can turn left to switch 2, or turn right to get back to the upper level for saving the game and recharging. After flipping switch 2, return to door B, which will be open now, revealing an elevator. Activate it and follow the corridor at to the end where there is a pattern buffer. Use it, then jump from there down to the narrow corridor in the south wall. Activate switch 3 to unlock door C, then head back to it.
It's time to enter the Alien mines! Open door D with switch 4, then jump down. A small niche to the left holds a 1x recharger, if needed. Head on until you reach the junction in the middle of the alien lava pools; turn left for a teleporter back to the upper level, or head straight on to find the nuclear bomb, which can be activated by switch 5. You must now return all the way to the beginning of the level, where platform E will have lowered revealing the bomb controls. Flip the switch to detonate the bomb (sealing the alien section in the process), then head for the initial comm terminal. On to Aggressive Marketing!
