The second installment in the DOOM series did not stray too far from the original in terms of monster design. They all look relatively the same, which is something that cannot be said about DOOM 3. While the monsters look the same, there were a few new demons added and one of the notable ones was The Revenant demon. The poster demon for the new DOOM, the Revenant demons are known for their jetpacks and high pitched screeching. Also notably added to DOOM II was a new weapon: the super shotgun. The rest is history.