William Shatner's TekWar is a 1995 first-person shooter computer game, derived from the TekWar series of novels written by William Shatner. It was designed using the Build engine.
The premise details an ex-cop who is hired to be a hitman whose mission is to exterminate drug dealers who peddle "tek". The two most distinguishable features are the hub-based level system (all the levels are interconnected by a subway station), and the fact that all of the non-player characters (NPCs) in the game (enemies, policemen, civilians) are shootable. When the player draws his gun, policemen shout: "Freeze! Drop your gun!" before they start shooting at the player. When a policeman or enemy is killed, their ammo can be picked up. When the player aims at a civilian, he/she ducks and screams: "Please, don't shoot!" When any NPC is shot, a blood spot appears on the wall behind it. If an NPC is shot with one of the stronger weapons in the game, they will explode into gory bits (gibs).