Demon Gate is a notable series of commercial compilation discs released by software publisher Laser Magic beginning in 1995. All of the compilations in this series include WAD files for both Doom and Doom II, and most include a shell utility for selecting files from the CD-ROM and launching the game with them, in most cases the freely available frontend. These discs were retailed in major software outlets and supermarkets and consisted of material gathered from online collections such as the idgames archive.
Publications in the Demon Gate series include the following:
- Demon Gate: Over 600 New Levels for Doom & Doom II. Published in a square form factor CD jewel box.
- Demon Gate: Over 600 New Levels for Doom II. Doom (Apple Macintosh) edition, published in a cardboard game box.
- Demon Gate: 666 New Levels for Doom & Doom II. Both CD jewel box and cardboard box editions are known to exist. Actually contains about 670 levels.
- Demon Gate Mega Collection: Includes over 6000 Hot New Levels for Doom, Doom II & The Ultimate Doom. Both CD jewel box and cardboard box editions are known to exist.