All the alien structures in Empyrion: Galactic Survival belongs to Alien Faction. The core of the alien faction emits red light as oppose to green light for player core. There are four distinct alien faction in Empyrion-
- Epsilon
- Xenu
- Rados
- Ghost Rider
- Talon Guardian (Passive)
Each faction occupy different planets and hostile towards player. there are few alien structures which don't belong to the above mentioned alien factions.