Oxygen

The premise of Oxygen is simple - no tricks, few puzzles, mostly choices. You, a lowly technician, have the unenviable task of deciding who on board the Aegis mining station will get oxygen from the slowly leaking tanks.

This is a resource management game in which you decide how oxygen supplies on a spaceship are to be diverted. You have three moves each time to decide. Tension comes from the fact that the ship is, literally, divided: striking miners on one side, and "the establishment" - the captain and the rest of the crew - on the other.

The initial section was very fiddly for me, because I have lots of trouble visualising mechanical solutions, so I followed the walkthrough for that. The bulk of the story is mechanically much simpler, though.

Oxygen's story is largely linear, with just a few major branches; so far, none of the endings I've found are exactly happy. Your position as a tech notwithstanding, you ultimately must choose where you stand - with the miners or with the leadership - and either results in the destruction of the other (or both). It was heartening to see the PC change from lazy and over-ambitious to actually taking a stand.

Oxygen reminded me of Fragile Shells: both are set in a spaceship, with mechanical puzzles. Fragile Shells is a bit more focused on story and characters, while Oxygen, more on the PC's current relationship with his other crewmates and resource management.