1. Oxygen: The oxygen level on the spacecraft starts dropping as the crew loses power to the oxygen tanks. This forces the crew to ration their oxygen supply and switch to a backup oxygen system.
2. Power: The spacecraft loses power after a critical electrical problem. This leads to several systems failing, including the ability to control the spacecraft's temperature and atmosphere.
3. Water: The spacecraft's water supply is also depleted due to a leak. This forces the crew to ration their water supply and find alternative ways to obtain water, such as by collecting moisture from the spacecraft's walls.
