Dungeon Defenders 1
From Dungeon Defenders 2 Wiki
The Story
Etheria was once a land of living legends. Long ago, brave warriors across the realm stood together against an immortal evil known as the Old Ones. In the wake of this struggle, the champions: the Archmage, Knight, Ranger and Templar, locked away the power of the Old Ones inside Eternia Crystals. Recently, the realm's heroes, called to a far away crusade, have left their younger kin to tend the castle and its chores. Bored with their dreary duties, and imagining action and adventure, the pupils accidently unleash an ancient force that has long been dormant! Now these heroes in training will have to grow up quickly. Together they will defend the Eternia Crystals against those who would seek to resurrect the ancient evils![1]