Underwater Level Walkthrough & Submarine Guide

Tue, 25 Aug 2026 00:00:00 +0000

💡 Level Snapshot | Difficulty: ★★★★☆ | Est. Duration: 45 Mins | Complexity: High

Full guide for Human: Fall Flat Underwater level, featuring yellow submarines, oxygen tanks, buoyancy physics, and achievements.

1. Level Overview

Underwater immerses your ragdoll character into a deep sea ocean world with buoyancy physics, yellow exploration submarines, and sunken ruins.

Attach floating oxygen tanks to heavy underwater gates to lift them up from the sea floor.

Board the yellow exploration submarine. Operate ballast pump levers and propeller thrusters to navigate through underwater caverns.

Solve the trident pressure plate puzzle inside the sunken temple to drain the water lock and drop down into the exit whirlpool.

Oxygen Balloon Flight: Hold two inflated oxygen tanks under your arms while under water to float at high speed straight to the temple entrance!

Deep Sea Diver: Stay underwater for more than 5 minutes continuously.
Submarine Captain: Park the yellow submarine inside the drydock without crashing into rocks.