Implementing the game is a good proof of the documentation ;-) I'm obviously biased in favor of efforts like this. Part of the reason is that I'm going through

Implementing the game is a good proof of the documentation ;-) I'm obviously biased in favor of efforts like this. Part of the reason is that I'm going through another DOS game with a disassembler and trying to understand, document, and reimplement the game engine (it's going glacially; I'm no reverse-engineering expert, and I don't have much experience in assembly). To me, it's a fun subject for a hobby. And I don't like that a game that would run on a 25MHz 386 natively won't run at full speed in Dosbox in a computer built 10 years after the game's release (or on my various ARM machines, a modded game console, etc). Something feels "wrong" about that. I have the same feeling about the game being unmodifiable. I've seen how much came out from the open-sourcing of various id engines, and it would be great to see modifications, enhancements, and remixes of the other classics, too.