Back in the 1980s when text adventure games were popular I was thinking of writing a game so I started by writing a compiler for my own game language. I never

Back in the 1980s when text adventure games were popular I was thinking of writing a game so I started by writing a compiler for my own game language. I never completed the game and I probably had more fun developing the language than the game. This was also the time when OOP was becoming fashionable and my language allowed me to experiment with class and prototype OOP, multiple inheritance etc. so it was definitely a useful experience.