: A free DLC that adds customization options for your Martian structures.
: A free expansion that introduces new terraforming mechanics like vegetation and biodiversity.
: Offers a DRM-free version at GOG , which allows you to own a digital copy you can download anytime. Free Content and Expansions
: A free content update focused on the late-game urbanization of Mars. Per Aspera on GOG.com
While the base game requires a purchase, several significant expansions and updates are available at no extra cost to owners of the game:
You can purchase the official version of the game from these authorized digital storefronts: : Available for purchase at Steam .