Astrocreep

Astrocreep is a game played by Markiplier.

Game Information
Help the alien evolve it's way around the rooms and create a nest to fully infest the entire space station! Start as a simple parasite that evolves with each successful kill, then choose which branch of evolution you want, the telekinetic space octopus, or the acid spitting cosmic squid!

Episode

 * WHAT THE HELL IS THAT?!