Fluidity is a physics-based puzzle game developed by Curve Studios, released in 2010 for the Wii. The premise centers on a magical illustrated encyclopedia called Aquaticus, which has been corrupted by a malevolent substance known as the Influence. Players control a body of water capable of shifting between liquid, ice, and steam states, navigating across the animated pages and panels of Aquaticus by tilting and twisting the Wii Remote. Each form carries distinct properties — ice can adhere to surfaces, while steam can discharge lightning — and mastering these abilities is necessary to defeat enemies and progress. Collecting Rainbow Drops restores the encyclopedia's power and unlocks new chapters and capabilities. Hidden puzzle pieces scattered throughout the world open optional playrooms featuring timed challenges that test the skills developed during the main quest, though these side activities are separate from the primary objective of defeating the Influence.
