Yay, I got my own subdomain:

Wuzzy.hedgewars.org

These domains “work” as well:
Star-and-Moon.hedgewars.org
stupid.hedgewars.org
whatisgoingonhere.hedgewars.org
anything.hedgewars.org
xxx-hedgehog-pics.hedgewars.org
how-to-build-a-melonbomb.hedgewars.org

And so on …

And YOU, yes YOU have your own subdomain as well! Just insert your name in front of “.hedgewars.org”! Isn't that great?

OK, enough sarcasm for now.

Basically any subdomain of hedgewars.org seems to “work”. Well, not really. As soon as you click any link while on these subdomains, you get error 404.

I guess they all should either be rejected altogehter or redirect to hedgewars.org (of course, exceptions apply: issues.hedgewars.org, hg.hedgewars.org, etc.).