Acorn Electron games #3D Bomb Alley CIBBBlitzkrieg CIBCCastle of Skull Lord CIBGGisburne’s Castle CIBGunsmoke CIBHHobgoblin CIBHobgoblin II CIBIInvaders CIBKKane CIBMMonters CIBPPlan B2 CIBSSnapper CIBStratobomber CIBTTwin Kingdom Valley CIB