Add more players with the MultiPlayer Adapter! Simply plug it into your controller port (controllers not included) of your PS1, and now up to four players can play Multi Tap compatible PlayStation Games. Hook an additional MultiPlayer Adapter into your second controller port and you've got eight-way play! You can use this adapter to attach up to 4 controllers into one controller port. It also has 4 memory card slots! This will work for the original Playstation-1. This is NOT compatible with any other systems.