Welcome to the Planet Zombotron.
Zombotron is filled with mutants and zombies which kill anything that moves.
The previous civilization built bio-robot factories some of which are still working.
You are one of the few bio-robots left on Zombotron, it is up to you to try and rid the world of the mutants.
Run, jump, and shoot mutants while procuring better weapons as you go.
Enjoy Zombotron.