The PS Plus line of games has been released for PS4 owners for May and you can check out the list below. Players who subscribe to PS Plus will be able to download the following titles at no cost:
Bionic Commando Rearmed 2, PS3
God of War: Ghost of Sparta, PS Vita
LocoRoco Cocoreccho!, PS3
Switch Galaxy Ultra, PS4, PS Vita
Table Top Racing: World Tour, PS4
Tropico 5, PS4
Not a terrible lineup and I may give some of these a go. Which ones catch your eye?