Fortress Keys

Walkthrough

1. 1Use the transporter in Strange Manor to visit Valvegard Garrison (western fortress) first
2. 2Defeat all enemies around Valvegard until the area counter reaches 0%
3. 3Engage the boss Thunder Tank — a heavy tank using close-range charges and missile barrages
4. 4Use the Nature's Snare skill (Level 2) to throw back its projectiles at the boss
5. 5Collect the key from the purple-marked crate after defeating the boss
6. 6Teleport to Aeronautical Research Base (southeastern fortress) using the transporter
7. 7Clear all enemies in the base to reach 0% liberation counter
8. 8Defeat the boss Storm Crusher — a fire tank with similar mechanics to Thunder Tank
9. 9Grab the key from the purple-marked crate
10. 10Travel to Marni's Laboratorium (northern fortress) as your final destination
11. 11Defeat all enemies in the laboratorium
12. 12Battle the boss Dreadnought — a robot boss with dangerous yellow laser attacks
13. 13Collect the final key from the purple-marked crate to complete the quest

Tips

• Valvegard Garrison is surrounded by a blue barrier — you must start there using the transporter
• Complete Valvegard first as it's the most challenging fortress
• Both Thunder Tank and Storm Crusher have similar mechanics — learn the pattern and adapt to Dreadnought
• Use Nature's Snare skill to reflect tank projectiles back at the bosses for massive damage
• Stay mobile during Dreadnought's yellow laser attacks — dodge in circular patterns to avoid damage
• Capture the Dreadnought robot with projectiles to finish it quickly
• Each fortress boss drops one Artifact — collect all three for Chapter 12 progression
• The order of fortress visits doesn't matter — tackle them in any sequence you prefer

NPCs Involved

• Mysterious Man