AQUA KITTY UDX is a fast-paced action game that takes place underwater. You play as a team of milk mining kittens who drill down under the ocean seabed to extract vast reserves of full-fat milk. The game includes an epic Dreadnought mode and the original AQUA KITTY - Milk Mine Defender at no extra cost.

The game offers three different modes: Classic, Arcade, and Dreadnought. In Classic mode, you clear waves of robotic sea creatures while protecting milk mining kittens. There are four sea areas, each with a large boss enemy at the end. Arcade mode adds gems that you collect and use to buy upgrades that persist across levels. Dreadnought mode is the newest addition, where you fly through huge multi-screen enemy dreadnought ships, weaken them by blasting parts off to expose the shielded weak point, and then destroy the core, all while trying to free imprisoned cats.

AQUA KITTY UDX features extra bosses, improved visuals, and rebalanced gameplay compared to the original Milk Mine Defender game. It is best played with an Xbox or PS4 controller, as controllers with analogue sticks give the most precise movement control. Keyboard control is also supported, but mouse control is not.