Euclid taught us that spheres are masters of espionage. Tactical espionage, that is. One might even say tactical espionage action. Metal Sphere Solid is a short game that can be completed in five to ten minutes, but it's still an innovative take on the stealth genre. A longer game of this nature would be great, but everyone with a bit of time to spare should give Metal Sphere Solid a shot. It certainly beats geometry class!