From RPG Description:
A highly detailed post-apocalyptic RPG from Fantasy Games Unlimited. The players portray freedom fighters who have taken up the fight against invading Soviet Forces, Martians, or aliens that can blend into human society - it is up to the GM to choose the invader to be faced by the Freedom Fighters!
The boxed set includes 80 page character creation book, 32-page "Resistance" book detailing game mechanics, and 3-fold GM screen. An introductory adventure called "The Errant Knight Gambit" is also included.