The only perfect game. No one will ever design anything with mechanics tighter than this, and it's pointless to even try.

Sadly I haven't really had the opportunity to play IIDX in some years now; I keep meaning to pick it back up, but the costs associated with it and the fact that I already have a bunch of other hard games to play keep me from really committing to it. It will always have a special place in my heart, though.