In order to recapture her homeland, Yggdra gathers her allies and confronts the empire. "Yggdra Union" is a tactics RPG that features three elements: the "Union System", in which players team up with her allies to launch attacks, the exhilarating "Clash" through army battles, and the "Tactics Card".

StoryThe Kingdom of Fantasinia is ruled by a royal family that inherited the blood of the gods who built up a stable era. However, the Kingdom of Fantasinia fell under the attack of the Empire of Bronquia. Meanwhile, Yggdra, a lone girl who escaped With her kingdom's last hope in hand, head to the remotest land on the southern tip of the continent. She arrives and meets a boy, the king of thieves, Milanor. The battle to liberate Yggdra's homeland begins with that encounter...