Batman: Arkham city

Moreover, I'm just another clueless civilian, not playing any role.

What's the point of such a statement?
If you're a civilian, you should try to attract the attention of the killers by pretending to be a role player.
If you're a role player, you should try to pretend to be a civilian and play it cool.
But you're just saying, "I'm a civilian, kill me." Who needs a civilian? Especially one who doesn't care about the game? That would be a gift to the mafia. It would be, but you're not a civilian. You're probably a mafia member who's annoyed by the chatter, right?

Mafia, kill me.

Why "mafia"? Why not "maniac"? Why not "negatives"? If you're a mafia member yourself, you won't kill yourself, and the maniac won't touch you. You're alive, it's a clever plan, right?

Tox could very well be a civilian, because he asked to be killed from the very beginning. Although this could also be a trick, but I still prefer the first option.

Arko doesn't justify his vote, but he defends Tox. The most obvious and stupid reveal ever, lol.

asked to be killed from the very beginning

Probably a mafia member who's annoyed by the chatter

Everything is so obvious, tsk tsk tsk!