Post#5 » Sat Dec 03, 2016 1:58 pm
You might notice these repro/backup copies never come with manuals. The CDs are still CDRs so if you could see the data side that would be a dead giveaway. You might also notice on the label side, the ring of clear plastic around the center hole, sometimes this area says something like "memorex photo disc" in black letters which you might be able to see in a detailed photo. Also, I believe most authentic DC games had the artwork printed even in this area of the disc. You might also consider that if something is too good to be true, ie: one person selling $20 copies of many very rare games in perfect condition, that the games are not authentic.
For other systems there are other ways to tell. For example, sega CD games never ever came in DVD cases which did not exist at the time. US Sega Saturn games came in tall plastic jewelcases, etc. Again, repros of these, and repros of cartridge games, almost never come with a manual.