User blog comment:Narve/Forgotten is out/@comment-27849239-20160509000905/@comment-26842175-20160509154655

there are some differences, camels and towers get extra attack in the official one. These is quite  fair balance changes if you ask me. I believe Feudal building in the official one are reduced in HP (not if unofficial one). And the Lama and cow do not exists in the unofficial one, so Incas start with a turkey instead, which is less usefull for scouting as far as I know. Also the transport ship is unavailable in the dark age for the unofficial one. There are also some civ specific differences. And I believe the unofficial AI is more powerfull than the official.

Also if you are buying the HD version, you have acces to steam.