Apparently Watchdogs and Tetris ultimate are PlayStation Plus May 2016 game.
source:http://www.hotukdeals.com/deals/playstation-plus-2016-watch-dogs-tetris-ultimate-ps4-psn-2437007
source:http://www.hotukdeals.com/deals/playstation-plus-2016-watch-dogs-tetris-ultimate-ps4-psn-2437007