Surviving Mars is a city building game set on the Red Planet. Starting out with some basic resources and funding, you create domes for a human colony to live in, setting it all up in advance with cute little bots. It took me several attempts to get into this, but once I finally got past the tutorial I got sucked into it for a few days. There's an interesting divide between getting all the construction work done by drones, which don't need anything, and the colonists who need food, water, oxygen, work, comfort etc. It's tough at the beginning getting everything in place, but once you research half the tech it becomes a relaxing exploration game about building the wonders and terraforming.
Overall I really enjoy the game, although there are a few annoyances.