The best way I can describe this game is one part tropico and one part dwarf fortress. It's a city builder, trade management and hapiness management game. I love nearly every bit of this game, with the exception of it's moderatley boring combat.
Luckily, combat is a relatively minor point of the game and, even though not very exciting, still works and is quite easy to grasp.
Another strong point in this games favour is it's gentle learning curve. Dawn of Discovery introduces game ideas throughout the well crafted campaign. It could even be said that the Campaign almost functions as a tutorial for the enormity of the game.
And enormity is what you get! Like in Dwarf Fortress, you don't just make items. For instance, if you want to supply your nobles with lether jerkins then you first build a farm for the cows, then a skinner, then a tanner, then ship them to the clothes maker, etc. It is luckily somewhat more simple than DF. A great game to scratch the itch!