So, what exactly is this game?
Well, it's like a sandbox game - but it involves planning and strategy to achieve some goals.
Your people start off in a world full of grasslands, forests, hills, and rivers. You'll explore, and maybe settle down to create a city.
As you create more units and gain population, and as your city expands, you'll explore more of your world.
You might encounter other players; you might create new cities, trade with others, and guard your borders.
You'll also customize your tiles, adding buildings to make them better at one thing or another.
But from there, it's sort of up to you! And as the game continues to develop, you'll be able to do more and more both in singleplayer and multiplayer.