Sadly, I can't entirely remember. I only got back home today.
I think my weapon is space marine power armor (with assult jump-jets), a plasma pistol, and a chainsword that returns health to me every time I hit something, and my companion is an ork mekboy. Heck, I would probably just end up leaning on my chainsword laughing at the mekboy's quips as he mows the zombies down with his ludicrously fast firing chaingun.
Or my weapon is the oh-so-awesome plasma cutter, and my companion is an infector from dead space. Go forth, my minion, and make me an army of space zombies!