There Are a lot of Different Endings
Man of Medan is a cinematic, choose-your-own-adventure type of horror game, meaning that there are tons of different outcomes and endings that can happen depending on how you decide to play the game.
If you’re planning on having a certain outcome on your first playthrough, be prepared to not succeed because there are twists and turns that make it very hard to keep everyone alive.
The game pretty much wants you, the player, the kill everyone in your group, and the game will make sure that you do.
I recommend just playing without worrying too much what happens the first time and letting Man of Medan’s story just run its course. Once you see how things play out, you can go through scene selection or start fresh to change the narrative to how you want it, if you can figure out the triggers and such.