I just got adamantium Armor from an event (only 1000 BC!). But I couldn't find it in the tech tree (did expect that). Is that intentional? Also... 1000 BC is NOTHING for such a good tech! I more then doubled the armor on my ships...
Yes, Adamantium Armor, as for all the unique techs found in ruins, does not appear in the tech tree, as they are not researchable and not tradeable. That's intentional. As for 1000 BC being too few to ask for it. Well, first, you need to be lucky to get that event However, I agree that we should increase the price a bit. Thanks!