What is debug mode in gaming

Debug mode usually lets the user change many aspects of the game if you know how to use them properly. On the other hand debug mode is a mode which the programmer or the developer of the game can control and change many things and see many details to debug his game, as the it's name(debug mode) also says. By a little search I found some other definitions: Debug mode is a development tool which typically allows you to break the rules of the game in any number of ways and to give technical information that is of benefit to the programmers working on the games. Examples of debug are Object Debug, Night Mode and Placement Debug. It also makes collision blocks,invisible blocks which can't be passed normally, appear. (Form: http://info.sonicretro.org/Debug_mode) The debug menu is a special menu that the programmers used to test the game and debug it (hence, the name "Debug menu"). This allows us to do everything they did when making the game, including a great deal of options that are not normally available. (From: http://www.gamefaqs.com/console/gamecube/file/516492/28318)