Duke Nukem began as a pc clone of you basic platform game. basically you left a trail of destruction in your wake and earned points depending how much you destroyed. in the wake of 3 other apogee attempts to recreate the madness of wolfenstine 3d in 1991. apogee decided to try another method. taking rott's disregard for political correctness to the next level duke took on both doom and quake and lived to tell about it. the built engine that powers duke allows for tricks that an full 3d title could not do such as buildings that are bigger on the inside. This game keeps all of the violence tha made duke a legend in 2d and basically you kill any thing that moves and shoots at you. keeping NPC's from the blake stone games you run in to civilians witch you are punished by the game for shooting. Back when it first came out it was pretty controversial for its content but it set the bar higher for content in games.