OneTank

Four divers. One tank. One friend who won’t stop talking.
OneTank is a chaotic online co-op diving adventure for up to four players. Explore underwater caves and ruins, collect treasure, and bring your haul back together. Your hoses connect you to one shared, portable oxygen tank. You need to communicate—but talking costs air.
Your loudest friend becomes everyone’s problem
Speaking while connected to the tank underwater uses extra oxygen from your team’s shared supply. The louder you get, the more air you burn. Giving directions, calling for help, and arguing about whose fault it is all come at a cost.
One carries. Everyone trusts.
Only the tank carrier can see how much air remains. Keep your crew informed as you navigate the depths together. Watch your connections, stay close, and remember the way back.
Finding treasure is only half the trip
Every discovery brings a decision: explore a little further or head back with what you have? Carrying something valuable feels very different when everyone is breathing from the same dwindling supply.
• Online co-op for up to four players
• One portable oxygen tank shared by the entire team
• Hoses connecting divers to their shared air supply
• Microphone volume affects oxygen consumption
• Underwater caves, ruins, and treasure to discover
• Stylized divers and plenty of opportunities to blame your friends