Trite

The Trite is an enemy found in Doom 3. Trites resemble spiders, being an upside-down, human-like head (similar to a Lost Soul) with several spider-like legs, albeit only six of them. They possess a cluster of multiple spider-like eyes where the two human eyes should be. They usually attack in swarms and are rarely seen alone. They are characterized by their sharp throaty roar.

Combat characteristics
Trites primarily come in swarms. They attack by leaping at the player from more than a dozen feet away, or by biting at close range.

They tend to surprise the player by crawling out of narrow spaces where the player can't fit, or by dropping from ceilings with the aid of spider thread. Although new Trites often emerge to replace those that are killed, Trite swarms are not infinite.

Trites die differently from other enemies; they curl up into a ball and explode in a splash of green blood. Sometimes the Trite is able to commit suicide by exploding if the player is at an altitude where the Trite is completely unable to harm them. Players that experience this will not have to use any ammunition to kill them, as they would eventually all die off themselves, although the explosion can still do damage to the player.

Tactical analysis
Although individually weak, a large swarm of Trites can be potentially dangerous if the player does not maintain good tactics. While the Shotgun is excellent in dealing with one or two Trites, the weapon's low rate of fire makes it ineffective against a swarm of six or more.

The Machine Gun's high rate of fire and accuracy can quickly eradicate a swarm of Trites. While the Chaingun and the Plasma Gun also has similar advantages, they should be reserved for bigger enemies, as a swarm of Trites is a minimal threat to be using such powerful weapons.

If the player is within a very safe distance from their jumping attacks, even the Pistol can also be effective in taking down a swarm thanks to it's high accuracy, as two shots from the Pistol can finish off an individual Trite.

In Resurrection of Evil, they can be killed instantly with the Grabber. However, it is not recommended to use this weapon when facing a large swarm, due to the slow rate of fire (caused by the cooldown).

Trivia

 * The name "Trite" means two things:
 * A type of jumping spider. (For its obvious arachnid anatomy.)
 * A synonym for the term "overused". (For their large numbers and frequent appearances.)
 * Trite appearances are similar to that of Ticks. This could suggest that they are either related as similar species, or the same species but of different ages (Trites could simply be older Ticks or vice-versa) or different sexes.
 * Owing to their spider appearance and tendency to appear around the Vagary, it is conceivable to think that perhaps Vagaries are "Adult" or "Queen" Trites.
 * Doom 3 does not have Spider Masterminds or Arachnotrons, two spider based enemies. So this kind of creature can be analogous to them.
 * The Trite bears a striking resemblance to one of the monsters in John Carpenter's movie The Thing.
 * The Trite bears a slight resemblance to the Facehugger in the Alien series.
 * There are no huge swarms of these creatures in the expansion. They only appear, at the most, in groups of four.