Since I first played this it's held a solid spot in my top 3 favorite WADs of all time. At times beautiful, terrifying, and strangely poignant, but always epic and incredibly atmospheric. I'll never forget the sensation of playing MAP13 for the first time. 200/5
Kind of a clever idea, but I'm not sure the idea was realized very well. Most of these are rendered pointless by the fact that you can just run to the exit switch, and with just a bit of scripting you could have emulated the DoomRL level behavior a lot better.
