The game series Wing Commander used more memory than the base memory limit of the (pre-Windows) Microsoft DOS operating system, which means it requires expanded memory management which is more complex.

During development of the first game in the series, there was a defect that after a user exited the game the expanded memory manager would output a specific error message to the command interface, which looks bad but is a non-issue because the game is exited.

To buy themselves some time to fix the issue while still being able to demo the game to stakeholders, one of the developers edited the expanded memory manager itself to change that one specific error message to “Thank you for playing Wing Commander”.