The Mothership is a bonus level that can be accessed from the alternative exit that always appears on level 3-4. It appears in a futuristic structure that extends from the ceiling, dappled kangaroos hang at the top of the structure.
It is a very volatile place - automated defenses and explosive enemies will tear the level apart to get at you, and the Alien Lord's psychic attacks will more than likely kill you immediately if you are hit.
Unlike other levels, this level goes in reverse. You will enter the level at the bottom of the map, and the exit will be at the top. When you exit, you will return to the beginning of 3-4 and be forced to do the level again before entering the Temple, meaning you will be forced to complete an extra two levels on a standard playthrough.
If you don't have a Jetpack or plenty of ropes, this level will be tricky to traverse, although there are platforms that move up and down that will carry you up to the next floor.
At the top of the mothership, the Alien Queen guards an extremely powerful Plasma Cannon.
The Robot spelunker can be found inside a capsule here.
Dangers
All Monsters and Traps (besides The Ghost) that can be harmful/hostile in The Mothership.
