The NES also had “multitaps”. One model was wired (the “Four Score”), the other was wireless (battery powered; the “Satellite”) with an IR receiver unit that pl

The NES also had “multitaps”. One model was wired (the “Four Score”), the other was wireless (battery powered; the “Satellite”) with an IR receiver unit that plugged into both controller ports. The IR wireless one was, in my experience (it was the only one I had) far less janky and failure-prone than one might suppose. Actually worked quite well.