Beyond: Two Souls buyers who make their purchase at GameStop and other participating stores will get access to the game's bonus chapter 'Advanced Experiments'. It sees Jodie Holmes working with Aiden to overcome test chambers in a similar fashion to Portal. No cake mind you.
There's no word on when this content will be released to everyone, but we'll update you once we know more,
The game’s out now in the states and across Europe on Friday.