Sony has added new PlayStation 4 titles under the pre-order category of the PSN store.
The Playstation US Blog reveals downloadable versions of Call of Duty: Ghosts, Battlefield 4, Assassin's Creed IV and Killzone Shadow Fall are now available to reserve through PlayStation's digital storefront.
Pre-orders for the limited Gold Edition of Assassin's Creed IV and the Hardened Edition of Call of Duty: Ghosts are listed as well.
The games join Knack and Warframe on PlayStation Network's growing list of pre-order offers for PS4 titles.
Sony also announces pre-orders on current generation versions of CoD: Ghosts, BF4 and AC IV can be upgraded to a PS4 copy for $10. More info on the process can be found here.

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