The Infernal Castle is a single player oriented level I made to replace Doom 2-s MAP01. It's actually made 4 years ago. Map is not too hard but there are places that can get you killed. Theme is a bit gothic and castle themed, no custom resources are used except new music. This map requires ZDoom/GZDoom to play since I developed this map for this engine however I think it's possible to run this on some other source ports as well, it's just not tested.