The Inceptor is the key to making the game work, and it may be Father.io's fatal flaw. It's both an infrared emitter that acts like your "gun", and a sensor that determines whether you've been shot. You connect it to your phone with Bluetooth, and it clips to your phone facing the direction you want to shoot. It fires about 50 feet, the upper limit for IR at this scale. The Inceptor is only needed to play standard laser tag games, and the story is mostly governed by GPS.