Aquattack is an action game that follows Agent Captain Blitztek on a mission to prevent the Axtoatles from taking control of the world. The game has four levels, each with its own unique gameplay mechanics. The first two levels take place in a motor boat, where the player must travel from left to right while avoiding enemy opposition and collecting fuel by picking up refreshments dropped by Allied planes. As the player progresses through these levels, they encounter new challenges, including different types of enemies that require precise timing to eliminate.
Level three introduces a hang glider, which provides a new level of challenge as the player must navigate through enemy-infested skies without collecting fuel. The final level requires the player to cross a guarded energy field while transporting four bombs to the other side, with only one bomb able to be carried at a time and a strict time limit.
The game features a loop system, where after completing all four levels, the difficulty increases and the gameplay speed accelerates. With nine hits available before defeat, the player's goal is to earn as many points as possible before succumbing to the final death.