You find a journal here on the desk.

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"I have discovered a new dimension! The only problem is that it's filled with monsters worse than the undead here. I have broken the portal, and have no plans to persue it at this time. We don't have the resources to deal with it now, and we can't afford to loose any more men.

I wonder if there's any connection between that hellish realm and all the monsters that have been assaulting the bunker lately? I never imagined that such monsterous fairy tales could come to life. People are loosing their sanity and acting irrationally. If it weren't for Marshall, this place wouldn't hold together. I fear we are our people's only hope. The ships never returned. I guess they assumed no one made it alive. I can't say I blame them.

Roger tells me this chunk of planet was drug along by the metor field's gravity. We're still circling the same star, but it's doubtful anyone will find us here. God help us all."