Co_minas is a custom "combat" map for Natural-Selection.

It is set on a small spaceship, the NSS Minas IV, property of Micro-Nano Systems, a private reseach corporation.

In response to an automatic emergency call, a nearby unit of TSA marines is dispatched there to investigate what is going on. Once they phase in, they find out the ship seems to be empty of human life, aimlessly floating in space.

After a quick briefing, their commander order a small squad to go check out the main engine, and try to restore it's power.