In my one there was only Mike, Sam and Emily at the lodge at the end (Matt was alive but on the outskirts of the mines hiding from wendigos). They all stood still and while the wendigos were fighting Emily ran out to safety (survival queen <3) whilst Sam and Mike were signaling to each other about the filament bulb and blowing up the lodge etc, but then as Sam I had the option to "save Mike" or light the fire, and I chose the latter. I wonder if I'd chosen the first option whether they'd BOTH be alive or NEITHER would be alive, or Mike would live and Sam would die. The whole reason I didn't risk saving him was because if it was the case where one died and one didn't, I'd rather Sam survived.