zkus dle jedné rady ze steam fora
bohužel to budeš muset dělat pokaždé co zapneš Mafii znovaI had the same problem but I Ctrl+alt+del to bring up task manager while the game is running. Under proceses I click on the > next to mafia. then right click on the new line and there is an option to maximize. I click on that and its full screen again. I have to do this everytime I launch the game but it works.