Later today, when PSN updates, PlayStation Plus members will be able to download Dead Nation: Apocalypse and Tomb Raider free of charge. Dead Nation: Apocalypse for the PS4 is a top-down twin-stick shooter that is best experienced with a friend. Tomb Raider for the PS3 is an action adventure title where you assume the role of Lara Croft, an adventurer who’s stranded on a mysterious island.
Apart from being able to add Dead Nation: Apocalypse and Tomb Raider to their download queues, Plus members will also have access to various discounts. Master Reboot, Awesomenauts Assemble, Need for Speed Most Wanted, Need for Speed the Run, Need for Speed Carbon and Need for Speed Hot Pursuit are discounted as part of the Spring sale.
Source: PlayStation Blog