Terror

the main alien you need to research to get the leviathan is the lobster man commander. I have had trouble getting ion armor before, but you need to research a Live Deep One, and to get mag. ion armor you need to research magnetic navigation

DOes anyone know where I could get a full working copy of terror from the deep, I can't find it anywhere

A tip with the bio drones, they don't explode if you use a thermic lance, that's if you get close enough to use one.