The first time we heard anything about John Romero’s fifth, and unofficial, episode for 1993’s Doom was last December. The mod promised nine new single-player levels and nine deathmatch levels of fun for free. However, there were also a pair of paid editions that brought extra goodies with the game. In February, Romero announced that the game

Source: Hot Hardware – John Romero’s Unofficial Sigil Doom Episode Has Finally Launched