The game Rebel Assault (v1.2) from LucasArts was released for MS-DOS on CD. It contained a handful of development content that wasn’t intended to be shipped, including Deluxe Paint II Enhanced.
https://github.com/Fortyseven/RA_1993
origin - http://www.pipiscrew.com/?p=6777 development-content-accidentally-shipped-on-a-certain-early-dos-cd-rom-game-from-1993