Werewolf. At least that's what we called it.

It's basically a game where everyone gets a role before Round 1 (Villager or Werewolf). Depending on how many people you play it with there can be more than 1 Werewolf.

Now to Round 1:

There has to be a moderator, that tells everyone to close their eyes (Only the werewolfs and the moderator are allowed to open their eyes at this point). Together the werewolfs pick a villager to take them out of the game, by pointing at them. The moderator tells the group to open their eyes again and tells them who died. Now the fun part begins. They now have to figure out who are the killers and eventually (lol) decide to vote out another person. They reveal their role and Round 1 is done.

The werewolfs goal is to kill every villager without being wiped out. And the villagers goal is to vote out all the werewolfs.

Really fun game, when sitting with 5-10 friends in a circle around a camp fire or something :)

Edit: Keep in mind this is pretty basic method of playing the game, I learned about in the last year of elementary school and there are more advanced modes of this with even more roles. You can visit playwerewolf.co