Spectrum

"Shooters are brown", I hear. Well, maybe since Quake they are, but Doom is actually a pretty colourful game. Just to prove it, here is a new episode for Ultimate Doom, using only standard textures and flats, and nary a hint of brown. SPECTRUM is an Ultimate Doom (complevel 3) episode for limit removing ports. It features nine wholly new levels, a custom boss monster (sprites & sound by Eriance, dehacked by @Obsidian), and new music (by @Taw Tu'lki). It is primarily designed for pistol start single player, but is playable in continuous and/or co-op modes. Deathmatch is not supported.