A DOOM level for the thinking psychopath, created using that most
excellent of editors, the DOOM Construction Kit (available in this library
as DCK.ZIP). It's mean, it's nasty, and you need a brain cell
(don't worry - one is enough). E1M1. Requires DOOM v1.666 to avoid HOM in
one of the rooms (because of a DOOM engine limit in older versions).

Kevin Wood.