3.75 avg. rating (75% score) - 183 votes


Play as a small bacteria in a microscopic free for all in order to get the top spot on the leader board and claim your crown. In Bacterio you’ll start off small and slowly gain size by picking up the orbs scattered around the map and taking out other players. Score essentially amounts to size meaning the higher score you have the bigger you are, as you successfully take out other opponents you are able to upgrade various aspects of your character also such as your speed, defence and damage. In the centre of the map is a dotted circle which whilst you’re in it will generate points at a rapid rate, be careful however as when you step inside it other players will get a pop up message letting them know and will try to take you out.


Use your mouse to control movement, left click to shoot and right click to boost your speed.

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2d Shooter Agario Style Free For All io games Unblocked Upgrades