Arch-vile/Doom 3

The Arch-vile is one of the few monsters in Doom 3 that remains faithful to its classic version. It is a large, off-white colored humanoid demon that stands a head taller than a normal human. Appearance-wise, it still looks emaciated, but does not have the sunken stomach, and has a skin pigment with bloody, tumor-like, bloated hands.

The player comes into first contact with these monsters in the Research Division of the Delta Labs and they are characterized by their high-pitched bird-like screeches and low-pitched cackles they make when they are present.

They serve as one of the high-tier enemies in the game as they possess very powerful attacks and have a good amount of health to sustain from heavy damage, although they pale in comparison to the likes of the Hell Knight and the Mancubus.

Combat Characteristics
Although the Arch-vile cannot revive defeated enemies like its classic interpretation (the bodies burn away instead of leaving a corpse), it makes up for this by summoning non-boss demons in its vicinity. Generally, they would summon Imps and Commandos, although they can even summon Hell Knights in later levels.

The Arch-vile primarily attacks by sending out a wide stream of flames to its target, which can cause massive damage. Also unlike it's classic version, it also has it's own melee attack, as it can slash its victims at close range.

Aside from it's attacks, the Arch-vile no longer maintains the same mobility as it did in the original game; it can only resort to walking slowly instead of running very quick. They can, however, occasionally sidestep in order to dodge the player's line of fire, given the opportunity.

Tactical Analysis
Defense-wise, the Doom 3 Arch-vile is overall weaker than it's classic version. It only possesses 60% of it's original health, and moves a lot slower, making them an easier target.

On the other hand, given the player's reduced speed and the lack of sufficient space to freely move around, their attacks are lot harder to avoid. The Arch-vile's ability to summon demons around the area can be very problematic if it is left unattended for so long. Therefore, the Arch-vile should be treated as a first priority target to take down in order to avoid the hassle from getting outnumbered by enemies.

Fortunately, the Arch-vile is introduced very late in the game (conveniently, one level after the player obtains the BFG9000). So players should be expected to be already armed with very powerful weapons like the Rocket Launcher and the BFG9000 by that point. It takes 2-3 rockets to take down an Arch-vile, and one single BFG shot to take down an Arch-vile. The Arch-vile's presence makes it a very perfect opportunity for the player to also rely on the Soul Cube. If the Soul Cube is not yet fully charged, players can rely on killing the lesser demons to charge up the weapon, and use it to kill the Arch-vile. Although precautions should be made as the Cube may end up going after a summoned demon caught within the crossfire, instead of the Arch-vile itself. Make sure to stay close and aim directly at the Arch-vile once the Cube is ready.

Other weapons like the Chainsaw and the Shotgun can moderately work, but players must exercise great caution to dodge their clawing and fire attacks as they can do massive damage buildup if the attacks all connect. The Lost Mission and the Resurrection of Evil expansion pack introduces the Super Shotgun, which acts as a more devastating close range weapon against the Arch-vile. One headshot from the Super Shotgun or two body shots will immediately neutralize the Arch-vile.