Postal

Postal is a 1997 isometric shoot 'em up video game developed by Running with Scissors and published by Ripcord Games. The player controls an anonymous gun-toting man as he commits mass murder in the town of Paradise, Arizona under questionable circumstances. Each level sees players killing a given percentage of police officers, military personnel, and other armed "hostiles" before being allowed to progress, optionally slaughtering unarmed civilians caught in the crossfire.