The entering, and death

Gingr and 20 of his friends are trapped in Tundra by his friend. There are only a few rules. If you get caught for killing, you get punished. If you cheat, you get punished. If you die, you go to the afterlife. And if you live after two people are left standing, you must free the ones who died. Who will die? Who will kill? Who will survive, who will thrive