Although the Duo version of Ys I & II is supposed to be common knowledge, what is crooked is gougers selling it as either disc-only or disc + manusl and calling it "complete". It's an incomplete pack-in version of a complete game. It's a variant at best and not a unique version. If TTi gave away extra discs in sleeves, they wouldn't be complete either. The only way the Duo Ys I & II would be complete, if you are going to count it as a unique version, is if it comes with a fully complete TurboDuo package with all the software and outer box sleeve.