How long can you stay alive at the bottom of the ocean? Hold your breath in this hardcore survival challenge ❗UPDATE 2.5 - New First Person Mode 🤝 Play solo or co-op 🌊 The most intense survival challenge ever 🧟 Survive massive hoards of enemies 🦈 Less than 1% of players can last 100 days 🔫 Unlock legendary weapons every few rounds 🔑 Discover shocking secrets hidden across the map