Unreal Tournament (1999)

Welcome to the gut-wrenching, heart-pounding world of Unreal Tournament by Epic Games, a universe where it's better to shoot first and shoot again -- then reload. Unreal Tournament pits players against ruthless bots or other human players in one of six game modes, each with totally new weapons and over 45 levels to use them in. Hone your skills in single-player practice mode, and then join a server to see how you rank among others in true multiplayer mayhem! And best of all, it's for Linux -- the mass destruction of heavy weapons meets the firepower of your favorite operating system!