Undercover Cops: Hakaishin Garumaa), sometimes referred to with or without subtitle as Undercover Cops Gaiden, is a 1993 turn-based traditional game developed and published by Irem exclusively in Japan for the Nintendo Game Boy on December 10, 1993. It is a spin-off of Irem's 1992 beat 'em up arcade game simply titled Undercover Cops. It is also the second-to-last game Irem released for the Game Boy, with Daiku no Gen-san - Robot Teikoku no Yabō being the last.