how to get they all live trophy 5

https://mega-wiki.win/index.php/How_to_Get_the_Until_Dawn_All_Characters_Survive_Ending

To get the They All Live trophy, you need to save every single NPC in the game's final chapter. That means you can't let any of the support characters, including the optional ones, die during the last mission. You'll have to plan your moves carefully, use healing items, and keep everyone alive through the boss rush. It's tough, but rewarding.