Another Steam Greenlight campaign for mention is the non-linear retro styled platformer of ' Parasite ', which puts you in control of an alien worm wanting to get rid of a human space colony on his planet. In this game that even has a demo for you to try, you have the ability of changing your shape into a multitude of characters such as a dog, human or worm with each having their own abilities to be able to sabotage the human complex.