«OPERATION C (魂斗羅 / CONTRA) SGB Enhanced» is a hack of OPERATION C (魂斗羅 / CONTRA) (Game Boy). This hack adds a custom border and custom colour set to make this game compatible with the Super Game Boy peripheral. «Operation C» for Game Boy is the Western (USA) version of the game CONTRA on Game Boy. This hack aims to improve the player experience by bringing the game closer to the original development of the CONTRA series. To do so, the game uses the tiles and color palettes from both CONTRA (NES) and «Konami Collectiob Vol.1» (Game Boy) games. This patch can be applied directly on this ROM: “Operation C (USA)”.

There are three versions of the PATCH, each with a different color palette but with the same custom border.