All levels are designed for vanilla Doom2. Recommended engines: prBoom-plus with "-complevel 2" and (G)ZDoom in "DOOM (strict)" compatibility mode. Jumping should be disabled.
For OpenGL ports like GZDoom and GLBoom-Plus you can add EPIC2GL.WAD after EPIC2.WAD for HI-RES skies: glboom-plus -file epic2.wad epic2gl.wad
Andrey Budko, Never_Again, Hitherto and authors of used resources.
Textures and flats: Powerslave, Hexen, Hexen2, Half-life, Kingpin, DeusVult2, Eternal IV, Alice, Doom3, urbanterror, Gunman Chronicles, water flat is made by esselfortium.
Sprites: Powerslave, darkimp, Realm 667.
Sounds: Powerslave, rylayeh.wad.
Music: "Spacehunter: Adventures in the Forbidden Zone" by Elmer Bernstein (1983) (map18).
Midi: Daggerfall (composed by Eric Heberling), Mortal Kombat, Hexen2, Daedalus.wad, Eternal.wad, FF8, Heroes2.wad, DV2.wad, "The unbegotten dreams" by BUHSİ2001, "TotalRecall 1990" by Jerry Goldsmith, Undertaker theme.
New from scratch
Doom Builder 1.68
Savegame buffer overflows on maps 14, 26, 28, 29, 31 and disappearing sprites on maps 26, 29 with DOOM2.EXE