Journey inside the body and protect it from vile viruses in a tower-based game.
Developer Heliceum is behind the strategy/action game, which calls on players to build towers inside the human body, protecting it from virus attacks.
The blocks must batter the germs and keep them at bay, but players must be sure to let all the relevant nutrients such as proteins and carbs enter the bloodstream.
The heart, lungs and kidneys are among some of the six organs that need to be protected across 15 levels, fighting against 15 different outbreaks.
The app also features four types of towers, which all come with unique upgrades, while the game is expected to provide at least five hours of play time.
In addition to adventure mode, users can also play in the emergency version where they need to battle off constant waves of the virus strains.
Human Defense is available on iPhone and iPad for £1.49. For more info, click here.