Flow

Flow (styled as flOw') is a Flash game created by Jenova Chen and Nicholas Clark. The game involves the player guiding a tiny, aquatic worm-like microorganism through various depths of the ocean to consume other organisms and to evolve their organism as the player advances. Flow is part of Chen's thesis research at the University of Southern California's Interactive Media Division and includes an embedded design of DDA (dynamic difficulty adjustment) which allows players with different skill levels to intuitively customize their experience and enjoy the game at their own desired pace. Within the first two weeks following its release, Flow attracted approximately 350,000 downloads. By the time the thatgamecompany website launched, it had increased to more than 600,000 downloads. The latest version, as of February 2008, was released on April 14, 2006.

A PlayStation Network version was announced in May 2006. This version was developed by thatgamecompany and released in America on February 22, 2007. A version for the PlayStation Portable developed by SuperVillain Studios was released in the UK in March 2008.