Osmos

Osmos is a puzzle video game developed by Canadian developer Hemisphere Games for different systems as Microsoft Windows, Mac OS X, Linux, iPad, iPhone and iPod Touch. The game was made available on Steam on August 17, 2009. The aim of the game is to propel yourself, a single-celled organism (Mote), into other smaller motes to absorb them. Colliding with a mote larger than yourself will result in being absorbed yourself, resulting in a game over. Changing course is done by expelling mass. Due to conservation of momentum] this results in the player's mote moving away from the expelled mass, but also in his/her own mote shrinking.