Taking place in a post-apocalyptic future, Once Human is a multiplayer survival game. As a human, you had no power to change the world, but you now have the power to battle monstrous enemies, uncover secret plots, compete for resources, and create your own territory. Once you were just a human, but now you can.
Check Your Sanity in Once Human
There are some food items which will restore your sanity, and you can build a bed in your base where you can sleep, which will also restore your sanity. When you encounter monsters or enter Pollution Zones, your sanity will decrease, but your maximum HP will remain the same.