OTHER IWADS AND RETRO-STYLE GAMES

ACTION DOOM 2 by Scubasteve, it's own IWAD for GZDoom
AMID EVIL for lovers of Heretic/Hexen
CHEX QUEST which came free with Chex Cereal in '96
CTHON Inspired by Gun Godz
DUSK for lovers of Quake
EXODEMON
GUNLOAD for lovers of Duke 3D
HACX made back in the day with the doom engine
HARMONY an IWAD for GZDoom with its own standalone version
HELLBOUND for lovers of all 90's shooters
HELLSCREEN for lovers of Devil Daggers
ION MAIDEN for lovers of Duke 3D or Blood
MEMBRANE
OVERLOAD for lovers of Descent
PROJECT WARLOCK for lovers of Wolf 3D or Doom
REVULSION Made by one of the makers of DOOM2: No Rest For The Living
RED SKY has its own engine called Sigma.
SEUM: SPEEDRUNNERS FROM HELL
SHOOTRAGE
WICKLAND
WRACK by a former DOOM level editor author
WRATH: AEON OF RUIN
ZIGGURAT

MODS: Hedon - GZdoom engine, Blaze (Doom Engine, by Twinbeast), Tigercake (Darkplaces, by Twinbeast), Rekkr, Memoirs of Magic, Supplice, Brute Force (Eduke32), Poharex: The Second Invasion, Xenomia.