This is a list of cancelled Game Boy video games. The Game Boy is a handheld video game console released by Nintendo in 1989. It was Nintendo's first portable game console, and enjoyed great success until being succeeded by the Game Boy Color (GBC) in 1998. During this time, several games being developed for the system were cancelled for reasons such as financial difficulties, poor market climate, and the forthcoming release of the GBC, with some games being moved to that system instead. Many of these games were not known about in detail or in any capacity until 2020, when ROM images of several game prototypes were leaked onto the internet as part of a larger Nintendo data leak.[1][2] This list documents all known games that were confirmed to be announced or in development for the Game Boy Color at some point, but did not end up being released for it in any capacity.