Yes, people have made 4 players, 6 buttons per player, but with all due respect those people aren't too bright. Therer are ONLY two, 4-player arcade games that support more than 3 buttons, and those are the the dungeons and dragons games, which are 4 buttons per player. So the maximum players 3 and 4 would need are 4 and 3 if you don't like those two games. Even the multi player console games rarely use more than 4 buttons per player.