D!ZONE was a series of CD-ROMs produced around 1995 by WizardWorks, Inc., a shareware and low-budget software distributor. The discs contain WADs and utilities collected from the Internet for Doom, Doom II, and other related games. These discs were popular in the early- to mid-1990s when household Internet access was slower and not as common as today. http://doomwiki.org/wiki/D!ZONE 1995
PC Zone CD Edition - April 1995
This coverdisk of the UK's PCZone magazine dated April 1995 (with Bioforge on the cover) contains 1000 Doom/Heretic/Doom 2 Levels, a Heretic Level Editor, Doom 1.9 patches, and various demos such as: Star Wars: Dark Forces, Descent, Iron Assault, Virtual Chess, Mortal Kombat 2, Noctroplis, Wings of Glory Version F1.6, and Premier Manager 3. There was an accidental inclusion of a pornographic Doom modification which when later found by buyers raised some controversy.
Instant Doom Levels: Level Master II For Doom, Doom II, Heretic, Hexen
This has more than 1,000 additional game levels, and instructional sample level (.wad) files discussed in the electronic book. There's a collection of the finest level editors, tools, and utilities available, including special editions or registered versions of the main editors discussed in the electronic book. It contains the Tricks of the Doom Gurus ebook. 1996