Activision and Sony revealed that Call of Duty: Advanced Warfare will be available as a Cross-buy title until March 2015. This essentially means that if you buy the PlayStation 4 version of the game, you will also get the PlayStation 3 version.

Q: When I buy/redeem the Call of Duty: Advanced Warfare Digital Base Game, Digital Pro Edition, or Season Pass for PS3 or PS4, how do I get the other version?

A: When you buy/redeem the Call of Duty: Advanced Warfare Digital Base Game, Digital Pro Edition, or Season Pass for PS3 or PS4 by March 31st, 2015, you can download the other version from the PlayStation Store for free by doing the following:

Log into your console using the same Sony Entertainment Network Account (PSN ID) used to buy/redeem the Call of Duty: Advanced Warfare Digital Base Game or Season Pass.
Navigate to the Call of Duty: Advanced Warfare content page for the version of the game you want to download.
Add the item to your cart and complete the transaction.
Wait for the download to complete.

Please Note: Season Pass content (which includes DLC 1, 2, 3 & 4) will only be available for full download once released.

Q: I already pre-ordered the game, am I still eligible for this promotion?

A: Absolutely! Simply follow the instructions in the first question above to access your content.

You can find out a few more details about this Cross-buy promotion by hitting up the PlayStation blog.