You're alone on Mars. The mission is over. Your crew left you behind. You've got a pressure suit, whatever you can pull out of the ground, and a long way to go before you see Earth again. There's a rocket between you and home. You just have to build it first. Sol One is a first-person open-world survival game that tries to get the science right. It's for people who like grounded, science-driven survival where the problem-solving is the point. Your oxygen, power, and food all come from machines you set up and maintain, and keeping them running is a must for survival.