WaLMaRT has also released “Serious Sam Classic The First Encounter” for PC. It is a high-adrenaline arcade-action shooter heavily focused on frantic arcade-style single player action. Once upon a time, early in the 22nd century, Earth was under a severe attack from Mental’s minions and humankind was about to evanish. Sam `Serious` Stone, worlds bravest hero, was sent back in time to change the past and save humankind from total annihilation.