welcome to Submarine below Zero Celsius in underwater Your spaceship dive under water in freezing planet, and you trap underwater whit big thick layer of ice, diving into a freezing underwater and collect oxygen subnauticaa . try to use your submarine was there before you and upgrade your diving skills and kill other fish monsters and discover and craft new thing,and level up your submarine to dive faster. be careful underwater below zero Celsius the oxygen hard to find so got to find oxygen sources quickly subnautica game. be the master of diving underwater when Celsius below zero simulator game the real survival ocean game. next update a lot of new features: -adding crafting table(knifes,iron rings for oxygen....) -adding sensor to Celsius below zero. (when you go deep underwater not including submarine) -early access to new maps(next 2 week). Download it's free underwater survival game :Submarine below Zero Celsius underwater Survival Simulator game.