When COVID-20 has swept the whole world, it requires a total cleansing. While doctors were developing a vaccine and trying to suppress the source of the disease, the virus took on the most terrible forms of mutation. His power has reached its maximum in distribution, he has learned not only to kill, but also to independently spread with enormous speed. Victims don't just die, they turn into walking corpses and continue the chain of infection through bites. They turn some into their food, others they make like themselves and join their own ranks. Instead of science, syringes and test tubes, it’s time to take up a radical way to solve the problem – weapons.

In the game Covid-20, players will have to become location nurses, mercenaries who are ready to rush into battle to the hottest spots in the centers of concentrations of the revived dead. Combat missions vary slightly, but in general it all boils down to shooting the breeding grounds of a new pathogen. For each kill, money is awarded, which is used to replenish ammunition and purchase powerful guns. Sometimes you come across boxes with random gifts, often this is just an increase in the assortment, but sometimes good things drop out. With a little fuss, you can set up a deadly trap in the form of a blast wave, fire gates and other hot tricks. Gloomy rooms, dark streets, lifeless spaces do not allow you to relax, since a horde of enemies can jump out unexpectedly and press close. In such situations, you have to tactfully retreat, holding the trigger and pouring lead on everyone, only having time to load new clips.