To play the digital PS4 version of an eligible, retail PS3 game, players must redeem a code on the PlayStation Store and then insert the PS3 disc into the PS4. Retail PS3 games that participate in Sony's PS4 upgrade program will come with a code in the box, as previously reported. Codes are one-time-use and can be redeemed before the player actually owns a PS4.

Digital PS3 games won't require a code to upgrade to PS4, but they will require the actual next-gen console. On the PS4 PlayStation Store, next-gen versions of that account's PS3 games will appear discounted to $10. Sony previously said the upgrade price would be determined by publishers.

Check here for a step-by-step rundown of the retail and digital redemption processes. Games enrolled in the upgrade program are Battlefield 4, Watch Dogs, Call of Duty: Ghosts and Assassin's Creed 4: Black Flag.