Initial FlOw Research

"flOw is a game about piloting an aquatic organism through a surreal biosphere where players consume other organisms, evolve, and dive into the abyss. With an embedded design of DDA (dynamic difficulty adjustment), players with differing skills levels can intuitively customize their game experience and enjoy the game at their own pace."

 http://thatgamecompany.com/games/flow/

Looking into flOw I found the game was very simple, with little to no goals, apart from to survive and eat other cells. It appears to be based on almost exactly what you would expect real life micro-organisms to be doing. With such simple game play thatgamecompany manage to create a highly addictive game using a basic yet appealing art style.

Initial Sketches of flOw microbes as well as new types of creatures