EDIT: file removed for overdue overhaul. Your thoughts are welcome in the comments.
"The last creature is in captivity. The galaxy is at peace."
Those words were supposed to mean a new era. But here you are, landing on yet another planetoid, searching for yet more evidence of bio-weapon smuggling. Don your modular exoskeleton trans-responsive outfit, or "power suit," and try to find a clue or two that will help save the galaxy. The global scan returned some possible, large, life-form pings, so you'd better bring a beam blaster, just in case.
This is M.E.T.R.O.I.D., a rules module for Modos RPG. It discusses drawing up space-exploration-style maps, equipping space adventurers, and designing end-bosses, to name a few. It also contains the Modos RPG 1.4 rules catalog, so everything is at your fingertips.
Modos 2: http://www.enworld.org/forum/rpgdownloads.php?do=download&downloadid=1437