Fluidity (known as Hydroventure in Europe and Oceania) is a physics puzzle game developed by Curve Studios and published by Nintendo for WiiWare on the Wii video game console. The game focuses on controlling a small body of water that is utilized in its different states of matter to progress through the game's levels. Fluidity was released in North America on December 6, 2010 and in Europe on December 24, 2010. A sequel, Fluidity: Spin Cycle, was released for the Nintendo 3DS eShop in December 2012.