Voyage of the Valkyrie

Voyage of the Valkyrie is a video game for the TRS-80 and Apple II published in 1981 by Advanced Operating Systems. It was written by Leo Christopherson.
Gameplay.
"Voyage of the Valkyrie" is a game in which players pilot the ship "Valkyrie" on its mission to subdue the ten castles of the island Fugloy.
Reception.
Forrest Johnson reviewed "Voyage of the Valkyrie" in "The Space Gamer" No. 48. Johnson commented that ""Voyage of the Valkyrie" is a novel arcade game, more valuable to TRS-80 users than those who game on the Apple."