In Hydra thieves are trying to steal the treasures from a museum, these artifacts contain secrets to a weapon and it is your job to stop them. The player is issued an experimental speedboat to navigate the rivers in order to retrieve the treasures from checkpoints. There are nine levels of rivers and oceans, while playing the game the player can collect money bags for extra cash and crystals for extra fuel. The obstacles are gun embankments, enemy crafts and other nuisances which will slow you down and you can loose your cargo which will float down stream that you will have to go and collect. At the end of each level the player then drops off the cargo and can then buy upgrades from a shop to improve the Hydra speedboat.