The old version (5.29.1) had implementation of classes.
Monsters might also drop weapons, ammo, health, or items such as bottles of medicine, artifacts, or runes which can also be stored in the inventory for later use. This guarantees that it will never be the same game twice. Also, in place of a shotgun, a shotgun from Doom 3 or the Arc of Death from Hexen might appear. For example, in place of an imp, a snake imp, or a kilmaat, or a catharsi, or one of several others might appear. The mod uses a randomization code which causes any monster or weapon in a certain class to spawn a random monster or weapon respectively. Æons of Death is a massive compilation WAD that brings together monsters, weapons, and items from numerous games, such as Heretic, Hexen, Quake, Quake 2, Quake 3, Half-Life, Duke Nukem 3D, Blood, Shadow Warrior and others.