It's a mafia game where you don't get killed by the mafia, but infected/converted.
Although there may be a limit in how many they can infect. After that it would be kill-only.
The first mafia game we did here on Dylflon was an infection one. The Thing themed, with a great narrative.
You can find the threads on this page:
http://www.gametavern.net/forums/sea...5&pp=25&page=3
You should read Dylflon's narration, I think they were pretty good. I also did a diary from my character, which turned out pretty ok as well. Edit: here's mine. It's not much fun when you weren't in the game though.
http://www.gametavern.net/forums/showthread.php?t=17384