Here is the full list of all 11 Mediterranea Inferno achievements.
Finish the game once
Ascend to Heaven
Witness an after-dinner nightmare
Win the duel unharmed during the Mirage in the rain
Refuse to buy a Mirage
Survive the first night of the vacation
Check all cabina during the mirage at the beach
See the puppet theather during the first Mirage
Shoot a neorealist scene during the Mirage on the film set
Sell the Italian dream during the Mirage at the cemetery
Collect enough holy cards for one final Mirage