It's a mix of Minecraft and Animal Crossing, but it doesn't really execute either idea terribly well. It's super easy to add basic mods to it thanks to the Steam Workshop, and I found it fun to collect things, but it's not very deep.
A grand strategy masterpiece. What it lacks in polish is a) made up for by mods, and b) inconsequential in the face of its grasp of what 'modeling history in a video game' should look like, which remains unparalleled by anything else on the market.