Aqua Kitty DX: Milk Mine Defender is an underwater side-scrolling shoot 'em up game released for the PS4. It is an enhanced version of the indie game Aqua Kitty: Milk Mine Defender, which was originally released in 2014. Players take on the role of a team of cats operating submarines, protecting milk mines from waves of mechanical sea creatures. The game features retro pixel art graphics, a chiptune soundtrack, and is known for its challenging arcade-style gameplay. It is often praised for its homage to classic shooters and its cooperative multiplayer mode.