Brand new 64 square kilometers now explorable.
Bohemia Interactive, the folks who bring us the award winning Arma and Day-Z games, are also behind the significantly less well known, but in no way less impressive, Take On Mars, a simulator that brings players to Mars to perform a multitude of scientific experiments, construct habitats spanning from shelters to entire installations, and search for viable sources of oxygen, water, and raw materials.
Take On Mars challenges players to actively manage their oxygen levels, food stocks, grow plants, and operate drilling rigs in the search for new resources, adding some Minecraft to your Mars exploration.
Anyway, so the game has now received its first Expedition One update- this lands the first human astronauts on Mars, gives them access to a buggy that lets them explore a new 8x8km area, and gives them access to an in game 3D printer which they can use to construct shelters and tools.
The rich Mars exploration sim, therefore, just got richer. You can buy it on Steam for $18.