Like the previous poster said, the game DVD is requiring online activation, since it is nothing more than the online downloads burned onto a disc with additional content, as well as an autorun installer. I do, however, like how the autorun can install all the episodes at once, making installation a breeze.
Concerning the part I quoted, "Disc games don't require online activation", was copied directly off the TellTale support FAQ page located here:
Technical Questions Section:
Do Telltale's games have copy protection?
Currently this is the only negative aspect I see with this title.
I do wish they would have informed us that they were going to require online activation of this title, regardless of whether you owned the DVD or not. To me, this seems only logical, as this would eliminate the annoyance someone would no doubt have after reading the TellTale Support FAQ area concerning copy protection on the media.