Game: Viral Invaders [SSM]
Viral Invaders is a game based inside the human body. You are a white blood cell and your purpose is to defend the heart as long as you can from the viruses that threaten the heart's safety. As a white blood cell, the player circles the heart, shooting antibodies at anything that could threaten the heart. The game takes an odd approach, mixing together pixelated graphics with anatomy-correct drawings. It may be linear but it's definitely addictive.