Game description from the publisher:

Under the oceans, the revolt is growing! Aquarion, son of the deposed dictator, is determined to regain his throne! Can you prevent the rein of a dictatorship?

Guardians' Chronicles: True King of Atlantis, an expansion for Guardians' Chronicles, introduces a new threat to fight: Aquarion and his elite troops. The tiles included in this expansion allow you to ally Aquarion with Doktor Skarov, or to plunge into the depths of Atlantis.