Games that have bits of programming that, for whatever reason, are never executed. These could be small sections of the main program, or large, complex subroutines.
(NOTE: Only games with significant amounts of unused code, or routines that have some kind of actual impact on the game's functionality should be included here; we're not looking to document every unused RTS or empty subroutine. Do not include anything that is already covered by a different category, such as unused enemies, items, or debug modes; however, code that was once a functional part of a debug mode, but has been broken/disabled, is acceptable.)