Standard warning: This list of life lessons contains SPOILERS. Consider yourself warned.

To kill space zombies, shoot them in the limbs, not the head.
Why? Because space, that's why.

Don't ever, ever shoot the pregnant space zombies in the stomach.
Or their little lizard babies will jump out and eat your head.

Baby zombie things have tentacles that pop out and shoot lasers at you for some reason.
And when they jump on your head, you tear them off and then punt them, it's both tragic and hilarious.

Space Marines that turn into zombies are very similar to hopped-up crackheads.
In that both move in creepy ways, and will seriously fuck you up.

The best weapons for fighting space zombies? Mining tools.
This is pretty true of regular zombies, too.

The big throbbing yellow bulge in the tentacle: Shoot that.
It's nice that they have those.

Your girlfriend? The one who was on the ship that's now full of dead people and seems to be spouting nothing but weird gibberish now? She's probably a ghost.
Or a hallucination or something. Or maybe you should just call her Standard Plot Twist.

If you find some weird religious artifact on a planet where you're doing mining work, leave it alone.
Just let it go.