I have to admit to missing the boat here, as Human Head Studios sent along a job opening email that didn't have a web link, so I wrote back for that without the content of the mail really sinking in, as the opening (which is indeed listed on the Human Head Studios Website) is for a level designer for what is easily inferred to be an unannounced game using the DOOM III engine. Here's a bit on that: "Human Head Studios is looking for a level design head to add to our collection for a project using the Doom 3 engine." And this: "Skills in level design for other engines are also a plus, but to be considered for this position, you must have skill in creating levels for the Doom 3 or Quake 3 engines (including games based on the Quake 3 engine)." The original mail about this is prefaced with this note: "Please note that as usual, Human Head and its employees cannot comment on unannounced projects."