Psyvariar 3 takes place many years after the events of Psyvariar 2. After the fall of ETA, a faction of Psyvariars declared that Earth was too precious to be forsaken. They vowed to reclaim and colonize it once more, with GUIS rising from its ashes to resume its original mission. Decades pass. The Earth colony thrives. Then... a signal. Alien. Unknown. The moment Gluon particles are detected, dread spreads like fire. The skies darken with a familiar terror— Earth is under siege once again. The time has come for a new generation of Psyvariars to rise... and save humanity.