flOw - The original free game of microbial life

Before it was a Playstation game, flOw was a part of Jenova Chen's Master's thesis. Your microbial character can move deeper in the water and consume other creatures - or not, as some may be aggressive.
Read more: http://snapzu.com/LacquerCritic/flow-the-original-free-game-of-microbial-life