H.K. Rules, also known as HemiKid.zip was the name of a project that featured on the old Chokage site. Though a download link was available for a time, it has long since been deleted. It was authored by Paul Mailloux.
For years afterward, when clicking the link the following information would appear:
Can't wait to get your hands on this game eh? Mail your comments to email@example.com and see what he says. Bear in mind he might not know what the heck you're talking about unless you mention the words Wolfenstein and Cars. I think this game is still on his old computer too. :)
The mod obviously featured players and antagonists riding in cars, a trait not often seen in Wolfenstein 3D mods and not at all before 2003's Grand Theft Auto III.
A later description, which collected all Chokage mods in one text file, stated rather simply:
H.K. Rules - *** Car fanatics, go crazy. Bizarre levels.
- Old Chokage site (archived)