One of the "Warriors of the Green Planet Trilogy of Games". The games are set on a future Earth that has suffered an "axial flip of 72 degrees", resulting in various disasters and changes that result in this hypothetical post-apocalyptic game world. Warriors of the Green Planet is the ground combat game. Units include melee, gunpowder, laser, and "para-psi" who have special radiation induced mental powers. A set of expansion rules allowed Warriors of the Green Planet to be played together with the companion games War of the Sky Galleons and Mind War.