SYNDUALITY Echo of Ada takes place in 2222, years after a mysterious poisonous rain called The Tears of the New Moon wiped out most of humanity and birthed deformed creatures that now hunt the population. Amidst the calamity, humans are forced to build an underground haven to survive. Take on the role of a Drifter whose goal is to collect the rare resource known as AO Crystals. In your quest, you must collaborate with your artificial intelligence partner to face xenomorphic creatures known as Enders and survive the hazards on the surface.