Hive Cluster

Spawns

 * Spitter
 * Gup
 * Parent
 * Evolved Lemurian
 * Archaic Wisp

Bosses

 * Toxic Beast
 * Imp Overlord
 * Scavenger

Artifact
The artifact gate can be found in the upper-rightmost corner of the map. Hanging from the ceiling is a series of invisible, climbable vines that periodically glow a bright pink. Jumping across is sufficient to unlock the Command artifact.

Bloated Survivor
The bloated survivor can be found in the bottom-right corner of the map. Inspect the corpse to get the achievement.

You will fight a giant bug when you interact with it, so be ready!

Boss Fight
Hive Cluster