GURPS: Mars Attacks RPG
Earth Is Under Attack!
The Martians descended upon Earth without warning. Saucers filled the skies. Blaster-wielding soldiers, giant insects, and unstoppable robots slaughtered the human defenders on the ground. It could have been the end of humanity – if not for the brave scientists of the Novas Vira, the only ones who saw the invasion coming! Now the fate of Earth hangs in the balance as both sides turn to science, desperately inventing new weapons and defenses in the hope of finding the one that wins the war.