Two capital hulls in Moon, two very different research bills. Death Fortress needs Shipyard 12, Hyperspace Technology 6, Hyperspace Engine 7 and a single level of Graviton Research. Avatar wants Shipyard 16, Weapons, Shield and Armor at 20, Laser 25, Hyperspace Engine 20 and Graviton 8. If you already have Graviton 1, the Fortress is the nearer flex; Avatar is the long campaign. Free space strategy in your browser: https://moonsiege.com/?ref=1&src=snapie