Twitter 上的Limited Run Games:"The Sigil Beast Box comes with a box signed personally by John Romero, a floppy disk-themed USB drive that includes the free megawad data and extras, an art
Got a Sigil Beast Box from Romero! - Doom General - Doomworld
Doom Is Getting a Megawad From Designer John Romero | PCMag
John Romero's SIGIL Beast Box PC Megawad – Limited Run Games