The steamworks is a massive series of conduits and machinery designed to help propel Mothership Zeta through space. It is a sub-area to the engineering deck and the second level encountered.
This section is needed but has not been written yet. You can help Nukapedia by writing it.
There are aliens, robots, and alien turrets guarding the area. The steamworks is one of the few areas that can be reentered after the player completes the main quest (This Galaxy Ain't Big Enough...) of Mothership Zeta, and the aliens therein may respawn more than once.