Sounding like the videogame version of the ancient sci-fi classic "Fantastic Journey," Nano Assault for the 3DS sees gamers taking on the role of pilot whose ship has been shrunk down and inserted into a human body (or maybe many human bodies, the trailer's not clear) to eliminate a dangerous virus. You'll fight your way through 32 biologically-themed levels that will adjust to your skill level. Nano Assault also allows you to outfit your craft with a wide array of devastating weapons.
Nano Assault is rated E10+ and comes out on November 22. It will run you a cool $29.99.