A four-level Mac Wolfenstein 3D mapset for the First Encounter.
Here's something unusual. A Madman's Redemption, a mod with nine maps and some changed graphics (you'll know 'em when you see 'em), is not your usual castle romp but rather an exploration of B.J.'s mind. Sort of. And you'll find said mind to be a rather odd, abstract and mildly unsettling place that ends with a bit of a twist. Interesting stuff.
Credits go to compyislife who doesn't go out much and would like you to contact him at compyislife (at) gmail (dot) com, but there's no guarantees the e-mail is still active. Try at your own risk.