Oxygen Not Included

You and two other folks appear in an asteroid with a limited air supply. Good luck.
Oxygen Not Included is a 2D survival game developed by Klei Entertainment, tasking you with developing and maintaining an underground colony. Since the space is limited, you are faced with issues you’ve never had to face in survival games, such as the build-up of harmful gases, floating and diffusing in a believably simulated manner. Or how to dispose of, or better yet: use the waste your colonists produce.
Presented in an ant-farm view it’s an amusing, yet complex game by a seasoned developer.