Sol One Gameplay: A Day on Mars, From Ice Run to Rocket
What a Sol One session actually looks like: the survival loop, base building, research, vehicles and the rocket, explained without marketing language.
Sol One is a first-person open-world survival game set on Mars. You are the crew member who did not make the evacuation, and the game's goal is to build a rocket and leave. That is the whole pitch, and it is a good one — but it does not tell you what you actually do for the first ten hours.
This page is about the loop: the moment-to-moment actions, the systems they feed, and how a session turns into a programme.
The core loop
Every session is a rotation through five activities:
- Gather. Leave the base, find ice, ore and salvage, and bring it back.
- Process. Refine raw material into stock at the processing tier.
- Build. Extend the habitat: a room, a seal, a power line, a machine.
- Research. Study samples and spend data points to unlock the next tier.
- Maintain. Fix what the environment broke and restock what the base consumed.
The genius of the loop is that the five activities are coupled. Gathering takes oxygen and rover charge; processing takes power; building takes material and power; research takes samples that come from gathering; maintenance is the tax on all of it. You cannot optimise one without touching the others.
The rocket is the goal, but the loop is the game. A player who rushes the rocket with an unstable base spends the run repairing instead of progressing.
A first day, hour by hour
Hour one: stay alive and get a roof.
You land with a suit, a tank and limited supplies. The first job is shelter: a small pressurized volume with an airlock and a way to produce oxygen. Everything else — power, food, research — waits until you can take the helmet off indoors without dying.
Hour two: power.
A habitat without power is a tent. The first generator or solar array and a battery are the priority; then the oxygen producer can run continuously.
Hour three: water and food.
Ice is the water source. A water production chain and a first crop bed turn a temporary camp into a base that can survive a bad day.
Hour four: the first real build.
With life support stable, you can expand: a fabrication room, storage, a proper airlock. This is where the base stops being a survival shelter and becomes a workshop.
Beyond: research, vehicles, the rocket.
The beginner guide→ goes deeper on the opening; the walkthrough→ sequences the whole campaign.
The systems, briefly
Life support
Oxygen, power, water and food are one system with four faces. Break one and the others fail in sequence: no power means no oxygen production, which means suit time, which means shorter trips, which means less ice, which means less water. The life support loop guide→ maps the cascade.
Base building and pressure
Structures are not just walls. A pressurized habitat needs sealed rooms, airlocks and atmosphere management. Large structures use blueprints and hauled material; small devices are fabricated and placed by hand. This is the game's most distinctive system and the one most likely to confuse a new player, so it has its own pressurized base guide→.
Manufacturing
Three tiers:
- Extraction — get raw material out of the ground.
- Processing — refine it into usable stock.
- Fabrication — turn stock into parts, devices and rocket components.
The crafting guide→ covers the chain.
Research and science
Samples and data points feed a research bench and a tier-one tree. Research is the gate on fabrication tiers, which makes it the real progression clock. The research guide→ covers priorities.
Exploration and vehicles
The map is a full-scale Mars with a physical sky and an accurate day-night cycle. Points of interest — crashed ships, earlier landing sites, abandoned bases — hold salvage and story. The Crawler and autonomous rovers extend your range. The rover guide→ covers logistics.
Environment
Dust storms cut solar output and visibility. The day-night cycle changes temperature and generation. The dust storm guide→ covers preparation.
What makes it different
Three things separate Sol One from the pile of Mars survival games:
The pressure system is real. Most survival builders treat "indoors" as a flag. Sol One makes pressure a resource with infrastructure: seals, airlocks, atmosphere. That single decision changes how bases are designed.
The goal is a machine, not a boss. The rocket is an engineering project with a material plan, not a final fight. Progression is measured in stock, not levels.
The scale is honest. A full-scale Mars with a physical sky means the planet is the antagonist. Distance, weather and daylight are the difficulty.
What it is not
- Not a shooter. Combat is not the confirmed focus.
- Not multiplayer. Single player, no co-op announced.
- Not a narrative RPG. There is story in the POIs, but the loop is systemic.
- Not finished. It is an Early Access launch.
Session length and pacing
A session has a natural shape: a planning phase indoors, a field phase outside, a processing phase at the fabricator. The field phase is where the risk is; the base phases are where progress happens.
The practical rhythm:
- Plan the trip before you leave. Destination, cargo, return trigger.
- Do not chain field trips without a base check. The habitat degrades while you are away in the sense that stores fall and faults accumulate.
- End the session at a stable point. Base stocked, power charged, next objective written down.
The game does not hold your hand. A short list — next unlock, next build, next field trip — is the difference between a productive session and an hour of wandering.
Is the gameplay for you?
You will like Sol One if you liked the base-building half of Subnautica, the systems pressure of Stationeers, or the "one more machine" rhythm of factory games. You will bounce off it if you want action, a guided story, or a finished product.
The Early Access page→ covers the state of the build; the release date page→ covers platforms and timing.
FAQ
Is Sol One first person? Yes. It is a first-person open-world survival game.
Is there combat? Combat is not the confirmed focus. The game is about survival, building and engineering.
How big is the map? The terrain is described as a full-scale Mars with infinite procedural generation, canyons and dunes.
Is there a story? There is environmental story at points of interest — crashed ships, earlier landing sites, abandoned bases — alongside the systemic goal of building the rocket.
Can I play with friends? No multiplayer has been announced. The game is single player.
Does it have a day-night cycle? Yes, with accurate Martian lighting, including the blue sunset.