This article has a talk page!Games with hidden bonus content that is accessed by doing something you normally shouldn't, like putting a console disc in a PC CD-ROM drive. This can include things like desktop wallpapers or Redbook audio tracks. These should be things that were clearly meant to be found by curious players, and not unused data that developers did not intend players to see.
NOTE: Content that is already covered by another category, such as hidden developer rants, should not go under this category.