The other Slipways look cool, but I don't think that there are any other forain empires, foragin trade, or battle mechanics. I may be wrong (nad correct me if I am) but if I'm right that may be a cool update or mod.
wow don't run this game on a Chromebook, or ital die or run at a snail's pace. Great game though, love it but I found a glitch where I don't get fame except for when I use a trader, and I also get resources when the game is paused... I mean You can definitely exploit it...