Fatigue is a mechanic in Raft. It is one of multiple threats to the player. (This page refers to it as "oxygen" from here on because that is the name ingame.)
Summary[edit | edit source]
Alongside Thirst, Hunger and Sharks, Oxygen (Formerly known as Fatigue) is one of the mechanics in Raft that can result in player death. When swimming underwater, the Oxygen gauge slowly depletes. It can be refilled by resurfacing. The player can stay underwater longer by crafting and wearing an oxygen bottle.