"John Romero Releases Free Sigil 2 to Celebrate 30 Years of DOOM"

John Romero, the original designer of Doom, has released Sigil 2, an unofficial sixth episode for the iconic first-person shooter. Available as a free download for consoles and PC, Sigil 2 features nine new maps that continue the story of Doom 2. The episode can be downloaded from Romero's website and requires a copy of Doom to run. A paid digital version with a metal soundtrack and a physical edition on a floppy disc-shaped USB stick are also available.