debug mode

noun2

1. •
   The mode of a compiler or IDE that allows for debugging, with the availability of information such as variable names and line numbers from the source code.
2. •
   A (usually hidden) tool or set of tools in a video game used in its development and testing, the use of which typically enables players to cheat, modify the game's behaviour, or perform diagnostics.

   • The debug mode enables full flight around every level, plus you can add a whole mess of objects to the stage at the press of a button. — 2017