Pandemonium started in 1989 by Paul (guitar) and Żuber (drums). Music was in the vein of Hellhammer/Celtic Frost, Bathory and Samael. Band's first effort was promo tape, recorded at rehearsal in december 1990.
In february 1992 Pandemonium recorded demo tape - legendary "Devilri". It was best selling demo tape in the world. They sold over 10000 pieces! First proper album "The Ancient Catatonia" was recorded in 1993. After that band was forced to change name (Żuber was kicked from band and copyrighted name Pandemonium - pretty neat for a drummer, huh?).
Under name Domain, band recorded three albums: "Pandemonium , "...From Oblivion"  and "Gat Etemmi" . After Żuber's death, band returned to their original name Pandemonium. Under new/old name two albums were recorded: "The Zonei"  and "Hellspawn" .
Sound of this tape is little rough but also dark and powerful. Excellent stuff. Track 3 is of course cover of Samael - great version of "Into the Pentagram".
Pandemonium official site
Pandemonium "Promo Tape" 
01. Haga Sophia [04:20]
02. Unholy Existence [03:45]
03. Into the Pentagram [05:50]
04. Might of the Godz [03:30]