I've not tried to use a PSOne multitap for PS2 games but from what i hear it won't work for PS2 memory card usage at least. I do know that the PS2 multitap will work with both PSOne and PS2 games, MCs, and controllers. This would be your best bet to get since you know that you'll eventually get some PS2 games that you'll want to utilize this function with. Well, i hope that you enjoy posting and have fun gaming. :thumbsup: