N-gage QD set the world on fire when it was launched. It features a full gaming deck with lots of awesome games to go with it! The NGage system was built over Symbian. It had a tweaked s60v2 OS- no themes, no extra support, nothing heavy. It was light as hell, meant only for gaming. Though, what bothers me now is that even newer and faster phones(like N72) cannot directly support n-gage...