ZPack - Random Maps for ZDoom

ZPack - Random Maps for ZDoom is a 2008 megawad by members of the ZDoom community which contains 30 levels, divided into three 10 map episodes. It requires ZDoom 2.2.0 or later to play (or alternatively, GZDoom 1.1.0 or later). Although the maps are divided into episodes and use the ExMx lump name scheme, the wad is for the Doom II IWAD.

Development
The project was initially thought up as being a kind of Community Chest for the ZDoom engine. Each contributor would make a map as they so desired and the end results would be strung together. As contributors began to join in and discussion got underway, some actual rules and guidelines formed. In the end, the agreed upon set of rules was still fairly lax (e.g. mappers were basically free to do what they wanted thematically and for gameplay, as well as could submit multiple maps) while having just enough structure to try and maintain a cohesion between the maps (e.g. mappers could not implement their own new weapons, which would clearly break the flow when no other map has the weapon or ammo for it). While ideas such having a central hub and allowing the player to choose maps in any order where tossed around, the correlation between map theme and difficulty was noted by some contributors and eventually a set order divided roughly by theme was settled upon. As the submitted maps began to reach a peak count it was then decided that the sets should be turned into episodes, with the easier and largely techbase-oriented maps going into the first episode and more difficult, hellish maps going into the later ones.

Levels
The Remains of UAC: Descent to Darkness: Armageddon:
 * E1M1: Vestibule by Captain Toenail
 * E1M2: Blast by James Cresswell (Phobus)
 * E1M3: KDiZD Launch Site by Daniel Gimmer (Tormentor667) & Björn Ostmann (Vader)
 * E1M4: UAC Waste and Storage Facility by Hnsolo77 (Exit to secret level)
 * E1M5: Site X by Captain Toenail
 * E1M6: Glacierbase by Icytux
 * E1M7: Nuclear Sky by Daniel Gimmer (Tormentor667)
 * E1M8: Thunderpeak Powerplant by Björn Ostmann (Vader)
 * E1M9: Termination by Björn Ostmann (Vader) (Boss level)
 * E1M0: Colossus Reloaded by Björn Ostmann (Vader) (Secret level)
 * E2M1: Switchback (A 3-in-1 Remake) by James Cresswell (Phobus)
 * E2M2: Ultimate Insanity by InsanityBringer
 * E2M3: More Tricks & Traps by Daniel Gimmer (Tormentor667) (Exit to secret level)
 * E2M4: Command Center by Icytux & Tuxido666
 * E2M5: Fanboy by Albino_Rhino AKA Jason Farlow (farlowj)
 * E2M6: Terror Cube by Zippy
 * E2M7: Black Inferno by Daniel Gimmer (Tormentor667)
 * E2M8: Tearing 'n' Temptation by Icytux
 * E2M9: Abyss to the BBQ by Daniel Gimmer (Tormentor667) (Boss level)
 * E2M0: For the Hell of It by James Cresswell (Phobus) (Secret level)
 * E3M1: Riveter by Paul DeBruyne (skillsaw)
 * E3M2: Infection by KeksDose
 * E3M3: Stereotomy by Nuke'em
 * E3M4: Fried Fortress by Icytux
 * E3M5: The Spirit Underworld 1 by Hnsolo77 (Exit to secret level) (Broken into a 2-level hub because of size)
 * E3M5: The Spirit Underworld 2
 * E3M6: The 13th Hour by Zippy
 * E3M7: Blackrock by Björn Ostmann (Vader)
 * E3M8: Point Hellfire by Paul DeBruyne (skillsaw)
 * E3M9: Ancient Hell by Icytux (Boss level)
 * E3M0: Sector by Xaser (Secret level)

Soundtrack

 * E1M1: "Stealth Frag" by, originally from 
 * E1M2: "Fortuna" from , composed by Hajime Hirasawa, sequenced to MIDI by Sivak Drac
 * E1M3: "Run" from , composed by, sequenced by Glacius
 * E1M4: "Between Levels" by Robert Prince, originally from Doom II
 * E1M5: "At Doom's Gate (Remix)" by Sonic Clang from the Classic Doom for Doom 3 soundtrack, based on the original composed by Robert Prince
 * E1M6: "Techno Doom" by Mark Klem, originally from STRAIN
 * E1M7: "Future Military Conquests" by, originally from Duke Nukem 3D
 * E1M8: "Grand Design" by Simon Judd (sirjuddington)
 * E1M9: "Caverns" by Marc Pullen (Fanatic). For the boss fight, "Death Wind (Climax Remix)" by Jay Reichard (silentzorah) based on "Death Wind" from 
 * E1M0: "Bye-Bye American Pie" by Robert Prince, originally from Doom II
 * E2M1: "Nuts and Bolts" from , composed by, sequenced to MIDI by by Dave Phaneuf and Sam Wolf
 * E2M2: "Venus Atmospheric Lab" and "Neptune Storage Depot", both from 
 * E2M3: "Baked Goods" by Lee Jackson, originally from Duke Nukem 3D
 * E2M4: MIDI sequence of "" by, itself the inspiration for "Bye-Bye American Pie" by Robert Prince
 * E2M5:
 * E2M6: "culturebag" composed by Virgill
 * E2M7: "CBLOOD10" by Michael Cody, originally from
 * E2M8:
 * E2M9:
 * E2M0: "Titania" and "Boss (Titania)", both from '''
 * E3M1: "Hell" by Kyle Richards, originally from from 
 * E3M2: "Nobody Told Me About id" by Robert Prince, originally from Doom
 * E3M3: "Battle of the Gods" composed by Knightrider of Doom
 * E3M4: MIDI sequence of "" by Alice in Chains
 * E3M5 (part 1): "Iifa Tree" from ' and "Esper Battle" from ' (in both levels)
 * E3M5 (part 2): Same as the previous level
 * E3M6: "Chaos Theory" by Xaser Acheron
 * E3M7: "The Depths" by Simon Judd (sirjuddington)
 * E3M8: "Crucifix Held Close" from , sequenced to MIDI by Jayster
 * E3M9: "Sign of Evil" by Robert Prince, originally from Doom
 * E3M0: "Hocus Pocus Theme" by Rob Wallace and "Klaymen's Theme" from  composed by and sequenced to MIDI by fatalM4
 * Title screen
 * Intermission
 * Text screen