Watch Dogs was a lie.
http://blog.us.playstation.com/2016/04/27/playstation-plus-free-games-for-may-2016/
Full Lineup
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
http://blog.us.playstation.com/2016/04/27/playstation-plus-free-games-for-may-2016/
Full Lineup
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