This is the power of a well-known, well-written, open-source engine. It was best-in-class when it was released ~30 years ago. It still works, and hobbyist gamer

This is the power of a well-known, well-written, open-source engine. It was best-in-class when it was released ~30 years ago. It still works, and hobbyist gamers don't care if the graphics are a little antiquated.