The Doomworld Forums offer a changelog and downloads of version 2.0a of Doom64 EX, calling this a "Feedback Build" of this DOOM II modification. A post in the Steam Users' Forums points to a previous such project called Doom 64 Absolution explaining these efforts at reproducing a PC edition of N64 game Doom 64: "The Absolution was a TC where the author tried to recreate all the levels. It's mostly accurate. The man however is a Doom 64 nut, and has gone on to create an engine that literally uses a Doom 64 N64 rom to generate a wad, and with that you can play the game in near perfect accuracy." Thanks Ant.