I've heard something about it needing to be disc at once (DAO) mode but what does that even mean? Then there is also selection for Mode 1 or Mode 2? I'm guessing it should be Mode 2 since Sega made the Mode 2 arcade that had Daytoner America. I don't know if each game requires special settings? I am wanting to try some of the best games on the Dreamcast. I am trying to bern the following games