I consider Utopia a hidden gem in the gaming community. I was playing a different strategy game when my friend referred me to this long ago, I got addicted and had to take a break lol.

So I wanted to start a thread of hidden gem games out there; they could be like Utopia or anything.
Maybe post screen shots too :-)

Mine is http://visual-utopia.com It's very similar to this game except it's visual "duh".