How to Play?

Best Free Mr. Bacteria Game. Killing bacteria has never been so fun! Kill some microorganisms in this fun and addictive game. And what makes it even fun, is if you die you can continue playing Mr. Bacteria. If you want to just look at what you killed, you can also do that, in the Bacteria Gallery. You have to kill all the bacteria on the screen. Use your arrow keys of WASD to move, fire with left mouse button. You have to kill all the bacteria on the screen. Use your arrow keys of WASD to move, fire with left mouse button.