Similar to Hexen's Bishop, the Acolyte fires a series of weak, slightly-homing projectiles. It can also speed around very quickly for a short period of time. They are very weak, however, and it doesn't take much to take one down.

A decently powerful flying monster with a fireball attack, a slower, stronger, explosive comet, and an arena-control attack where he lays a large carpet of fire across the ground for a short time. Doesn't have as much health as a player would expect, but still a nice challenge.

A somewhat beefy monster with a fast projectile attack, and can also spit a pair of aggressively-homing projectiles. Occasionally, it also can become mostly transparent for a short while.

A very powerful upgraded Cyberdemon that fires two rockets at a time. Additionally, it has a chance to fire two faster, homing rockets as well. A simple but difficult challenge for a player, but can get unfair.

The Apprentice of D'Sparil is a more powerful variant of Heretic's Disciple of D'Sparil. Rather than firing orbs of energy, however, it fires small meteors. It can also go invisible and invulnerable for a short period of time, during which it fires a few rounds of meteors in succession. It doesn't do a lot of damage, but it's hard to hit and takes a beating before dying.

A flying, weaker version of the Spider Mastermind. Does as much damage and is more mobile, but has less health.

The mother of all the Aracnorbs. The Queen can project multiple forms of plasma attack, including a stream, scatter shot, or a powerful homing shot.

A meaty mini-boss type similar in difficulty to the Bruiser Demon. It can throw varying spreads of fireballs, or a fast, heavily damaging comet. It can also take a large amount of punishment before finally succumbing.

A zombie with an automatic shotgun that fires four shots in quick succession at a time and reloads after sixteen shots. Can take more damage than Doom's standard zombies, and can deal damage to the player very quickly at close ranges.

The Avatar is meant to be used as a mini-boss. It has several attacks; a stream of fireballs; a large globe of energy that continually fragments into smaller orbs on contact; a large, homing projectile; and a wave of lightning. It's best placed in areas that have just enough cover to defend against its attacks, and it has enough health to last a while.