At present, the PSN+free games in May 2020 have been released.
European and American ips from May 5th to June 1st:
PS4: Cities: Skylines, Farming Simulator 19
Hong Kong from May 7th to June 1st:
PS4: Cities: Skylines, Farming Simulator 19
Japanese from May 7th to June 1st:
PS4 The legend of heroes: Thors Military Academy 1204, X-Morph: Defense
European and American ips from May 5th to June 1st:
PS4: Cities: Skylines, Farming Simulator 19
Hong Kong from May 7th to June 1st:
PS4: Cities: Skylines, Farming Simulator 19
Japanese from May 7th to June 1st:
PS4 The legend of heroes: Thors Military Academy 1204, X-Morph: Defense