Heretic was the first game to use the Doom engine outside of id. Produced by John Romero in cooperation of Raven Software, Heretic promises to be a great fantasy blastfest in a package! Fight off Gargoyles, Golems, Wraiths and Weredragons with your Dragonclaw, Phoenix rod, Hellstaff and Firemace! This game also introduces a new item system that's become a general must for most games, using with the familiar bracket keys. Items include Wings of Wrath, Polymorph Egg, Chaos Device, Disc of Repulsion, and everyone's favorite Tome of Power, that supercharges your weapons!
Here's a Heretic conversion of my Doom's Cathedral wad, including 2 maps. I used the latest GZDoom and I didn't test it on any other port.
Map format?
Zdoom and tested with GZDoom
Does jumping and crouching ruin the gameplay? Are they allowed or not?
Not allowed but I don't think it would ruin the gameplay.
I played the Doom 2 version of this as well but this one is better in my opinion.