GitHub

Doom (v1.9)
The Ultimate Doom
Doom II - Hell on Earth (v1.9)
Final Doom - TNT꞉ Evilution.zip
Final Doom - The Plutonia Experiment

Master Levels for Doom II
Doom II - No Rest for the Living (BFG Edition)

Heretic (v1.2)
Heretic - Shadow of the Serpent Riders (v1.3)
Hexen - Beyond Heretic (v1.1)
Hexen - Deathkings of the Dark Citadel (v1.1)
Strife (v1.2)
Strife - Veteran Edition (v1.2)

Chex Quest
Chex Quest 2
Chex Quest 3 (v1.4)

Freedoom - Phase 1 (v0.12.1)
Freedoom - Phase 2 (v0.12.1)