The "disposable" aspect of games mentioned by parent is crucial. Any successful business software is going to be maintained and extended for years, possibly de

The "disposable" aspect of games mentioned by parent is crucial. Any successful business software is going to be maintained and extended for years, possibly decades. This will be done by constantly churning team, where sooner or later no one will have a very good idea about the system's internal or requirements. In such cases, automated test cases protect against regression bugs AND also serve as a documentation of sorts. Whereas in games, after the game is released, the team will maybe patch it for a while and after that, chances are no one will ever touch that code ever again.