During the prototypes' development, some ideas are canceled and removed from the game. However, some of the developers' original plans are still kept in the games, but are not used. This content can be retrieved by meddling with the game's data files, and sometimes, can even be altered to bring the original ideas back to life. Other content, however, may no longer exist within the files, with the only evidence of its existence being in early screenshots, videos, concept art, or interviews.
The following pages list all of the known unused or scrapped content from the games: