Long Story Short
The first thing we need to be clear on is that this game is not Dungeons and Dragons. D&D is a game where the heroes win, and usually emerge more-or-less unscathed, stacked with riches beyond imagining. Don’t count on it here.
This is a world where morality ends at the edge of pragmatism. Even the most disciplined, righteous characters will find it a necessity to bend their ethos to the demands of survival, and often making it home in one piece is the best reward to be gleaned. It is not high medieval fantasy, it is Survival Horror Fantasy.