Enemies: Class 1 Drone, Medium Hulk, Super Hulk, Advanced Lifter, Secondary Lifter, Supervisor Robot, Spider Processing Robot, Baby Spider, Driller

The Blue Door is just ahead but you’ll need to hunt around for the blue key. Head forwards and down the tunnel on the right. This opens up to a room with a building in the center with doors on all sides. The Blue Access Key is in the middle. The Yellow Door is in the one of the corners and one of the side doors takes you to the Energy Center.

There are two entrances to the blue area. Either head back to the beginning of the level and go through one of the blue doors or take one of the other exits in the room with the yellow door and follow a fairly long path to the lower blue door.

Down the bottom of the blue area is a Robot Generator, and around the corner from that you’ll find the Yellow Access Key guarded by a Super Hulk. Grab the key and head back to the Yellow Door. Inside and to the left you’ll find the Hostages. Head through the other door and wait for the Robot Generator in the roof to stop spawning robots. Fly through the door opposite to find the Red Access Key.

Go back out the Yellow Door and then take the next door to the right. Go through the tunnel to the right and follow it through to the Red Door. Kill the robots and then carefully take out the Super Hulk guarding the door to the reactor.

Reactor Core: The reactor is around the other side of the wall and protected by Hulks. There’s a couple of Shield Boosters on the wall opposite the reactor.

Exit: Head back out through the red door and the exit is on the wall opposite.

Back: Level 7: Mercury Core                    Next: Level 9: Mars Military Dig