You control a parasite, the mean one.. ok not that mean. actually a bit cute. Each level there's a goal you must achieve from eating, killing other parasite or sometimes save and fed some annoying amoeba. You got like 12 weapons to buy and 6 abilities with 5 level to upgrades, more than 50+ achievements and more than 15 level and 20 minigames. Compete for highscore in the last level. Ok, mind that numbers and grab your mouse to rules!