20th Adversary of Emptiness contains everything Demilich have ever recorded, starting from Regurgitation of Blood demo (1991) and rounding things off with three songs the band recorded during their brief comeback in 2006.
The double CD package features new artwork by original Nespithe cover artist Turkka Rantanen, and the classic cover is included as well. The set comes with a 40 page booklet with lyrics, song commentary, new Demilich-themed art by David Mikkelsen and Johnny Maddox plus a lengthy Q&A session between Olivier 'Zoltar' Badin and Antti Boman.