Delta Green: Countdown is a 1999 role-playing game supplement published by Pagan Publishing for Call of Cthulhu.
Delta Green: Countdown is a supplement for the Delta Green setting about international agencies, cults and conspiracies.[1][2]
Shannon Appelcline explained that with the Delta Green setting, "the best-received book was a massive supplement three years in the making, Delta Green: Countdown (1999), in which Detwiller, Glancy, and Tynes massively expanded the setting".[3]: 88 Blair Reynolds pained the cover, and this was his final published work for role-playing games for about a decade.[3]: 90 Delta Green: Countdown had difficulty selling in Germany due to the country's censorship laws and the Nazi imagery present on the cover art.[3]: 85
Delta Green: Countdown won the Origins Awards for Best Roleplaying Supplement of 1999.[4]
