Far Cry Primal director Thomas Simon said Survivor mode will make exploration, crafting, and the difficulty “more realistic.”
Survivor mode brings a stamina gauge to the game that will make you slower and weaker as it drains. The only way you’ll be able to regain your stamina is to sleep. The mode will also remove the minimap, make human and animal encounters more rare, and add a cost to fast travelling-food and stamina will be consumed.
Crafting will take time, instead of being instant, and you’ll have to craft “cold-weather gear” as you’ll be more sensitive to the cold. Your Hunter Vision, on the other hand, will be increased, making it easier to spot enemies and animals.
Also the survival mode will introduce the permadeath on any difficulty, so be careful!