Secret of the Silver Blades

Secret of the Silver Blades is the third in a four-part series of Forgotten Realms Dungeons & Dragons "gold box" adventure computer games. The game was released in 1990. The story is a continuation of the events after Curse of the Azure Bonds. 375 years ago, twin brothers Oswulf and Eldamar built a castle in a large valley in the Dragonspine Mountains and the town of Verdigris was founded below the castle. The town prospered under the guidance of the brothers. Oswulf was a paladin and Eldamar was a mage. As Eldamar became older, his obsession for immortality grew and he began studying how to become a lich. Oswulf tried to stop his brother, but failed. Eldamar became a lich known as the Dreadlord. A horrified Oswulf could not bear to kill his own brother. He sought the help of a band of adventurers known as the Silver Blades to help contain the Dreadlord. The Dreadlord was certain that these adventurers were called upon to slay him and he began gathering armies of evil... full article at wikipedia