It should just be automatically added to your account that you bought the PS3 version on.Does anyone know if the free PS4 version for people who purchase the PS3 version digital can be redeemed via the web store? The instructions on the website say to redeem it from the PSN store on a PS4 and makes no mention of being able to do it via the web.
It seems silly that you'd have to physically do it on a PS4 but it would be a major bummer if that were the case since I don't have one yet (and may never).