New viruses are worse and worse. New species appear all the time. Viruses are increasingly masked. Now viruses are harder to defeat. Fight off waves of viruses and do not kill good cells. Viruses attack, and you kill them. Collect the medicine and always be ready to destroy the virus.

Control Keys:
Mouse Wheel - Change Weapons
WASD - Character Movement
Esc - Exit to Menu
LMB - Shooting