- Killing the Harvester while it is burning or frozen will also kill the Spawn it releases upon death.
- Although it cannot attack directly, physical contact with the Harvester causes damage to marines. Coupled with their ability to produce Spawn every few seconds, melee attacks against Harvesters are generally ill-advised.
- When threatened, the Harvester attempts to retreat from battle but continues to produce Spawn. It is advised that you pursue and destroy the Harvester before too many Spawns are produced.
The Xenonite (sometimes called a "Harvesite" in code) is a small, red and white insectoid that attacks by leaping towards a marine and exploding to shower its target in a corrosive substance. Individually, these Spawn do not pose a significant threat to a Marine, but caution is advised as their attack can knock a marine back and disorient them. Although similar in size, shape and movement to the Parasite, the Xenonite can be easily distinguished by its red and white color in contrast to the Parasite's yellow, and its attack cannot be negated with Electric Armor.