Attack white cells and get to the door. You are a virus in a human's body. Which means white cells will attack you. Shoot them down and get to the door. A boss will not let you get to the door until it is dead.
- Auto shooting system - when a virus is near enough to enemy, it will shoot the target automatically. But not while you are moving.
- Copy yourselves - pick up a heart to make a copy of yourself or two. The other you will do everything you do at different position. Use them to shoot more or turn on a switch in a distance.
- A classic platformer - Virus Protol is a classic platformer game. Which has a lot of gimmicks to get through and you have to jump around everywhere.
- Diamond achievements - you can find 4 diamonds in the lobby. Each has a different condition to turn on the light in the diamond. Try lighting them all.