Corrupted Horizons

Corrupted Horizons is DLC 4. This DLC adds one more soldier class: Mutoids, one new mechanic: Corruption, one new enemy type: Acheron, three new story missions and few pieces of research. Corrupted Horizons DLC starts when Pandoran Colonies research is finished.

Walkthrough

Research Pandoran Colonies

This research is unlocked when player reveals and destroys one Pandoran Colony (it can be any type of colony)