Takes longer to load, and runs worse than the original doom. =X

Doesn't work. I get a black screen with a white box to write shit and "This is Doom by id Software compiled to JavaScript using Emscripten. (more details)" at the bottom. That all.

to me it says, "Demo is from a different game version"

Not Found

I'm sorry, I could not find what you were looking for.

Please start over on the home page.

If you were following a broken link, please file a bug. Thanks!

They must of removed it.

Well heres a list of all the other games anyway.
https://developer.mozilla.org/en-US/demos/