Hall of Infinite Doors

Yeah! You are a trained killer. There is nothing you cannot face. You walk down the hallway and it gets so dark you cant even see your hand. You walk into the Left Disposal Facility and smell blood. You try to pull out your gun for added comfort but you feel a sharp pain in your leg. A hypodermic needle. The image of the needle starts to blur and you collapse and your eyelids begin to feel heavy. You wake up in the radio room. A hour has passed. Everything is the same except for the door to the "Left Disposal Facility" is locked shut, and the lock is covered in blood.