The Erchius Horror is your first major boss. It's a large, crystalline creature that floats in the center of the arena. Its primary attack is a laser beam that sweeps across the room. It also summons smaller Erchius Ghosts. The key to defeating it is to activate the four generators around the arena, which will periodically stun the boss. During the stun, attack its eye. Keep moving to avoid the laser and deal with the ghosts quickly. A good ranged weapon is highly recommended.
