The taming of the Red Planet has begun! In Terraforming Mars, you control a corporation with a certain profile. The United Nations Mars Initiative now declares the Red Planet open to colonization. It's time for you to start terraforming against 3 levels of AI and/or human players in single player, local hotseat or online. Improve the conditions on the Red Planet by warming it up to melt the ice and create oceans, planting oxygen-producing flora and introducing both small and big animals. Veteran players can also test their skill with the Solo challenge variant, the Corporate Era variant and dozens of Steam Achievements to unlock. Play project cards, build up production, place your cities and green areas on the map, and race for milestones and awards! Will your corporation lead the way into humanity’s new era?