Covirus.io Covirus.io is an Agario-style multiplayer game in which you have to survive in the dangerous world of coronavirus. To start playing, enter a nickname and press the pink "Play". Use your mouse to move your bacterium across the field and try to infect more people depicted by emoticons. Beware of blue circles with disinfectants: they can tear the coronavirus apart. Attack smaller opponents: this will make your covirus grow in size. Run away from large viruses, otherwise they will kill your bacterium. Go to the “Shop” on the main page of the game and choose cool skins for your accrued points.