Werewolves of Miller's Hollow Tie
Yes the game can end without any player alive. It happens sometimes. And in that case, the game is a tie.

With the basic rules, there can be as much as four deaths in a single night.


Wolf eats hunter
Hunter shoots witch
Witch poisons wolf
Civilian lover of wolf dies of love sickness


All the actions are simultaniously. And winning is declared in the morning and right after lynch.

By the way, during the day a complete kill can happen too:


Wolf and civilian lover vote for last player who happens to be the hunter.
Hunter shoots wolf
Civilian lover dies of life sickness.