Acquire Atlas Quake

Complete 25 quests while playing with at least one co-op partner.

Play Dead Island at least 28 days after starting it for the first time.

Acquire the Icarus Wings

Kill the Barbarian King, Euryale, and Perseus

Acquire the Head of Euryale

Acquire the Golden Fleece

Whip the Steeds of Time

Kill the Colossus of Rhodes, the Dark Rider, and Theseus

Acquire Typhon's Bane

Defeat the Dark Rider for the first time

Watch the 'Birth of the Beast' Treasure