All well designed games begin with a spirit of fun. Some games must deliver a serious and purposeful message, too. An example is Nightmare: Malaria, an iPad game with a similar mechanic as the popular side-scroller Limbo. The difference here is its message: malaria is dangerous and kills, especially in developing nations. Actress Susan Sarandon voices the beginning cut scene, and the action takes place within a sick young girl's blood vessels and brain. The mission is to save teddy bears while avoiding mosquitoes. It's dark and chilling, yet still engaging to play -- no easy feat! When you die, a message about malaria pops up, along with a plea for donating mosquito nets. To preview the game, download for free, or donate a net, go to Escape the Nightmare.