Use Flashback to rewind time

Develop first R&D upgrade in any department

Complete the 404 Storyline

Turn one borough into Defiant state

Activate a Flashback

You have discovered five of the hidden chests.

Kill The Black Hand.

Kill the Great White Graug.

Brand all 5 Warchiefs.

Collect 100% of the Artifacts and listen to their memories.

Activate all Forge Towers.

Brand a Captain while in combat.