Fluidity is a WiiWare 2d platformer developed by Creator/CurveStudios. Also known as [[MarketBasedTitle Hydroventure]] in PAL territories.

You are a puddle of water controlled by tilting your Wiimote. You have to clean pages of the magical book off The Influence -- bad black goo. You destroy black enemy blobs, collect Rainbow Drops and puzzle pieces and get power-ups.

A sequel: "Fluidity: Spin Cycle" was released for Nintendo3DS in December 2012.

!!Fluidity contains examples of

* ConvectionSchmonvection: Being inches away from lava won't melt you in your ice state.
* ElementalShapeshifter: All three states of water represented, each with their own set of unlockable abilities.
* GottaCatchThemAll: Apart from Rainbow Drops, each of the four worlds is filled with dozens of flowers and hidden puzzle pieces.
* {{Metroidvania}}: A big interconnected world where you have to gather power-ups to advance.
* PinkGirlBlueBoy: Eddy in ''Spin Cycle'' is a blue water drop. His sisters, the Rainbow Drops you save, are girly looking and pinkish.