Red Sol

A deep colony simulator on an alien world.

Your crew was bound for Mars. A wormhole brought you somewhere else. Start with a dropship, a mobile miner and limited supplies. Build the industry, life support and defences that turn a landing site into a home.

Red Sol is a single-player colony simulator combining city building, industrial logistics, research and colony defence on a procedurally generated alien world.

Cinematic illustration · Your first foothold in Ferric Canyon

You build the systems. Your colony grows.

You manage resources, production, research and defence. The District Planner grows your settlement, building homes, commercial venues and industry as demand rises. Colonists crew buildings, assist production and contribute to the colony economy.

• Establish. Generate power, secure water, oxygen and food, and connect the buildings your colony needs.
  
• Expand. Supply a District Hub, zone space and let the planner build to demand. Research unlocks what both of you can build.
  
• Defend. Position vehicles and towers to cover your colony. Keep ammunition and power flowing as the perimeter grows.

A foothold. A colony. A home.

Cinematic illustration · Mega Dome at sunset

From your first habitat to a town under glass. The Mega Dome brings homes, gardens and venues together beneath meteor-hardened glass, with room for up to 420 colonists. Building it is a megaproject; keeping it alive takes a working colony.

Growth means more than placing homes. Keep life support running and build the services that turn survival into a life worth living.

Ten biomes. A different horizon.

Cinematic illustrations · Ferric Canyon, Methane Marsh and Cryo Tundra

Explore ten alien biomes with their own terrain and plant life. Find deposits, encounter wildlife and megafauna, and plan around weather and disasters. Where you land shapes the resources and conditions you begin with.

Ferric Canyon · Dust Basin · Rust Desert · Oxide Highlands · Cryo Tundra · Salt Flats · Methane Marsh · Ash Steppe · Vitriol Fen · Frost Barrens.

Keep the air flowing and the warehouses supplied.

Illustrated dossiers · Mobile Regolith Miner and Cargo Drone · Select image to enlarge

Put your Mobile Regolith Miner to work scraping the surface. Its tracked chassis, solar panels and two docked cargo drones help turn a first landing into an industrial colony.

Use conveyors to move solid resources and pipes to carry liquids and gases. Cargo drones deliver materials to construction sites, while rail and air freight connect your growing industry. Each expansion needs a supply network that can keep up.

Build a city with a purpose.

Actual game models · Obsidian, Verdant and Granary arcologies · Not to scale

• Obsidian Arcology — A vertical city for 300 colonists, bringing comfort, fun, connection and wellness into one skyline.
  
• Verdant Arcology — A garden city for 240 colonists. Planted terraces supply its oxygen and contribute a surplus to the wider colony.
  
• Granary Arcology — Housing for 220 colonists combined with growing terraces that supplement your food supply.

Research your way beyond the outpost.

Choose your priorities across 133 research nodes covering industry, life support, medicine, logistics, defence and orbital technology. Improve the systems your colony depends on and unlock advanced equipment. Field discoveries open further upgrades, while the in-game encyclopedia explains the resources, buildings and creatures you encounter.

Research tree overview · Updated from game data on 18 October 2026

Raise your ambitions.

Cinematic illustration · Space elevator and colony in the Oxide Highlands

The surface is only the start. Build the space elevator's ground station, ship its parts to orbit and connect the tether. A staffed elevator car links your planetary colony to the station above.

Know what is coming.

Illustrated dossiers · Volvite and Dolerite · Colonist silhouettes show approximate scale · Select image to enlarge

Extracting valuable alien resources can disturb nearby nests and bring raids to your worksites. Rolling crystal swarms, airborne shards, armoured titans and burrowing attackers demand different answers.

• Volvite — Rolling crystal creatures that attack in swarms. One is weak; a pack is dangerous.
  
• Fulgurite — Floating attackers that launch shards. Some strikes call lightning and start fires.
  
• Dolerite — Rock-bodied titans whose armour shrugs off small-arms fire.
  
• Fossorite — Burrowing attackers that can emerge inside the colony. Defend more than the outer perimeter.

Defend everything you have built.

Illustrated dossiers · Hornet, Quillback and Jackal · Select image to enlarge

Meet three of your early mobile defences. Send a fast aerial response, escort a convoy or reinforce a threatened worksite.

• Hornet — A highly mobile gunship with an autocannon and guided rockets for rapid response.
  
• Quillback — An aerial defence platform with four independently aiming turrets and 800 rounds for ground and air targets.
  
• Jackal Gun Walker — An entry-tier mobile defender with 180 autocannon rounds and six rockets.

As your colony grows, add heavier vehicles and specialised defensive structures:

• Siege Tank — Heavy armour and a three-barrel turret trade speed for firepower. Carries 45 high-explosive shells, fired in three-round bursts.
  
• Longbow Missile Launcher — Guided rocket volleys from a 36-rocket magazine. Cover its minimum-range blind spot with other defences.
  
• Sunlance Laser — Twin laser barrels burn through heavy armour. Supply plenty of power and protect it from swarms.

Cinematic illustration · Hornet gunships, Condor bomber and Hunchback combat robot

Take the fight across the colony with fast Hornet gunships, heavy Condor bombing runs and the Hunchback's armour-piercing cannon. Mix mobile units and fixed defences to meet threats on the ground and in the air.

Build your own challenges.

Use the experimental Map Editor to create custom maps and missions. Mod support lets you add content or change the game's existing data, with creator documentation included to help you get started.

Explore the depth of Red Sol.

• 10 biomes and 42 flora species.
  
• 181 buildings and structures, plus 37 vehicles and robots.
  
• 133 research nodes spanning technologies, upgrades and discoveries.
  
• 9 hostile threat types, 11 wildlife species and 6 megafauna types.
  
• 9 weather events and 8 disaster types.

Figures reflect the current development version and may change. Building counts include district-grown structures and decorations; hidden, retired and test entries are excluded. Cinematic illustrations depict the game's setting; images labelled as in-game screenshots or actual game models show the game itself.