Dissolution (DISTION.WAD)

Bryant (aka "Gunrock") and Kevin ("The Solution") Robinson made Project Slipgate some time in 2001. It was a Quake-themed outing that explored the cool but sparingly-used (at least in the original campaign) "Complex" scheme as well as darker, disturbing fortresses. It also had something of a Doom 64 feel due to colored lighting, heavy atmosphere, and other aspects. The brothers decided to revisit the aesthetic with a side-story, released in 2002. Dissolution is yet another episode for ZDoom. It replaces MAP01-MAP07, though it's worth noting that the opener is a cinematic sweep of a fortress and neither requires nor takes any player input.

Project Slipgate (SLIPGATE.WAD)

Bryant and Kevin are the brothers Robinson. You might know them as Team Demise but I wasn't aware that they had a website until I started poking around for this review. They more commonly go by Gunrock and The Solution and they generally make levels for feature-rich source ports. (G)ZDoom, Vavoom, you know the type. Unraveling their development history has been a challenge because they are fond of going back and remastering their old works while eliminating the older versions. Where their debut, quake2doom, tried to bring the magic of Quake II to Doom, Project Slipgate worked with idtech2's flagship title. The most recent version replaces MAP01-MAP11, the same number but not slots as the original 2002 (2001?) release. It's built for ZDoom but the authors are fond enough of GZDoom's special effects that they recommend using it if you can.

quake2doom (Q2DOOM.WAD)

The source port boom was co-incident with the release of texture packs from other games. These resources were obviously floating around on the Internet in one form or another prior to 1999, judging by the appearance of Quake textures in Kurt Kesler's work. The community also had a history of using the similarly-formatted assets from Heretic and Hexen. Many of these packages started to formally arrive on /idgames, though, one being Q2TEX. Bryant Robinson aka Gunrock went on to fame and fortune with 2002's Dark 7 and its associated Mission Pack. QUAKE2DOOM appears to be his official debut, originally published in 2000 / 2001. It's a nine-level episode for DOOM2.WAD that claims to work in Boom-compatible ports but is clearly designed for ZDoom. The author recommends the now defunct ZDoomGL "for full impact" so, then, GZDoom if you don't want to do some source port archeology.