Atmospheric Composition
What you breathe — or rather, cannot
Mars possesses a thin atmosphere composed primarily of carbon dioxide. At the surface, atmospheric pressure averages just 0.636 kPa — less than 1% of Earth's sea-level pressure of 101.3 kPa. This has profound implications for every aspect of surface operations, from suit design to habitat pressurization to the viability of in-situ resource utilization.
◆Composition by Volume
The Martian atmosphere is dominated by CO₂, with trace amounts of nitrogen and argon. Oxygen is present in only minute quantities — far below the threshold required for human respiration without supplemental systems.
| Gas | Percentage | Game Relevance |
|---|---|---|
| Carbon Dioxide (CO₂) | 95.32% | MOXIE-type O₂ extraction feedstock |
| Nitrogen (N₂) | 2.6% | Habitat pressurization buffer |
| Argon (Ar) | 1.9% | Inert — limited utility |
| Oxygen (O₂) | 0.13% | Insufficient for respiration |
| Carbon Monoxide (CO) | 0.08% | Toxic — EVA hazard |
| Water Vapor (H₂O) | ~0.03% | Trace — humidity management |
◆Implications for Gameplay
In Mars Mission Simulator, atmospheric pressure directly governs your habitat's pressurization load and power budget. Maintaining 101 kPa inside a habitat on a 0.636 kPa planet requires continuous mechanical support. A breach — even a small one — is a mission-critical event. The game models pressure differential, seal integrity, and the cascading failures that follow a compromised airlock.