Ucell on 25 June 2014
Single-player games:
You should get Infamous: Second Son first on your PS4, followed by Tomb Raider: Definitive Edition (since you obviously couldn't have played the game before on a Nintendo console) and then Watch Dogs and Wolfenstein: The New Order.
Multi-player games:
You should get Battlefield 4 (that is if you don't hate EA) and Killzone: Shadow Fall (though the guns can feel slightly heavier than in other shooters).
I never buy indie games so I cannot say anything about them. Though you definitely need to get PS+ if you're into multiplayer and want some free games.
