Bosses

Floor 1 (Excavation)
ChamberLord

RingLeader

Guardian

Floor 2 (Archives)
Presence

Behemoth

Daemon

Floor 3 (Maintenance System)
Armor Tac

Devourer

Ice Wyrm

Floor 4 (Bellows)
Reactor

Ordinator

FireWall

Floor 5 (Sanctum)
OverLord

Floor 6
Unknown

Monolith

Floor 7 (Nowhere) [DLC]
Database

The Temple [DLC]
TheWarden

Chaos God

Seal Bosses
Bloke

Renegade