Thread:Deathstalker666/@comment-1496755-20151224121621/@comment-1496755-20160404112806

But since I am such a nice guy, I'll fill the gaps in your historical knowledge, free of charge.

Initially there was John Carmack's Catacomb - a 2D arcadey shooter with a top-down perspective. Then came the longer and better designed Catacomb II, which was later renamed and re-released as The Catacomb, which is included in the id Anthology. And eventually id Soft got the idea to turn this into a three-dimensional adventure (Catacomb 3D), which uses a very primitive prototype of the Wolf engine.

And this was the last thing done by id Soft, however Softdisk still held the rights over this exciting series, so they made three sequels of their own - The Catacomb Abyss/Armageddon/Apocalypse (with Abyss being the shareware episode).

Then, a few years later, some other publisher re-released Armageddon and Apocalypse under the names Curse of the Catacombs and Terror of the Catacombs.

See - this series has a long and complicated history :D