Red Alarm is a shoot 'em up that takes place in a three-dimensional (3D) graphical environment.[1] As a Virtual Boy game, it features a red-and-black color palette and stereoscopic 3D visuals,[1][2] the depth of which may be adjusted by the player.[3] The game is set during the 21st century, in the aftermath of a 70-year world war that led to the establishment of a utopian society without weapons. An artificial intelligence defense system called KAOS, which had been used to end the war, becomes sentient and builds an army to wipe out humanity.[4]