Two Towers Studio / Presents
Earth is gone. Every breath out here is borrowed.
A multiplayer survival game set in our real solar system, at real scale, in 2183. Join one of three rival companies, fly Newtonian ships between the stations that survived, and build a base on the Moon, Ceres, Triton, Mercury or Venus. Keep enough air in the tanks to get home.
The setting UTC 2183 · 83 years after the Fall
Nobody goes home. The oceans boiled away, the ridges beneath them still glow on the night side, and whatever started it is still argued about in the station bars.
The people who survived were the ones already in space: engineers who could run and repair machines, but not invent new ones. Three companies rose from them, Ironwatch, Freehold and Aurelian, and each blames the others for the Fall. Meridian Transit, in orbit above the ruin, is neutral ground under the Meridian Accord. Out past it, the Moon belongs to machines that were sent there a century ago and now treat every human as a target, and Mars went silent long before anyone could land.
You sign with a company and arrive with its Transport, 100,000 credits and a suit that starts empty. The planets sit where they really will be in 2183, the clock runs at real time, and a trip across the solar system takes hours. Everything else, including your air, you earn.
What you do Six ways to stay alive
Newtonian flight with RCS, main and landing engines burning liquid hydrogen and oxygen. Every burn spends propellant, including flight assist. Plot a route and let the autopilot fly it, or take the stick at any moment.
Earth to Mars in under an hour on a direct burnDrop from orbit straight onto terrain built from LOLA, Dawn, MESSENGER and Magellan mission data. Pin a landing site, hold above it, then bring her down on the gear.
Moon · Ceres · Triton · Mercury · VenusIlmenite in the lunar maria, thorium in KREEP basalt, ice in the polar cold traps, nickel-iron and platinum in the belt. Capture asteroids with a Miner, or let your rovers dig, then smelt, refine and sell.
Rock is graded: a rich lot pays moreFly a survey drone over your claim and order structures from the BUILD sidebar. Rovers build, mine, haul, pave roads and level ground while you plan the next expansion.
60+ structure types · up to 96 per claimOxygen, water, food and radiation dose all run down. Solar flares, micrometeorites, heat and dust will find the weak point in your suit, your ship or your habitat.
Flares can kill anyone caught outsideDedicated servers run one continuous solar system. Fly with your company, walk between decks in flight, and know your ship keeps flying its route and your base keeps working after you log off.
Target 32 to 64 pilots per serverFactions Choose one at registration
Every pilot signs with a company. It sets the look of your ships, rovers and base kit, the jobs you're offered, and who will shoot at you. Ships and structures cost the same and perform the same for everyone; each company has one edge.
"Nothing gets in."
A hardened security contractor. Armored hulls, blast doors and floodlit perimeters.
"Built by the people who live in it."
A homesteaders' cooperative. Canvas, crates and greenhouses that look lived in.
"Life, well engineered."
A polished megacorporation. Clean white modules, automation and very good lawyers.
Worlds Heliocentric · real ephemeris
Planets, moons and the Sun sit exactly where they will be on the in-game date. Distances are real and so is the clock, so a sublight drive makes the trips possible in hours.
Prototype measurements from Earth on a Direct route. Real trips vary with where the planets are, your ship, cargo and fuel. The Explorer's uprated drive takes about half as long; the fuel-saving Economy route can take several hours.
The neutral capital of what is left. Everyone arrives here, under an observation window that keeps the ruined Earth in view. Ten hangars, a shipyard, outfitters, a clinic and provisions.
Land anywhere on real lunar terrain. Minerals sit where the missions found them: ilmenite in the maria, thorium in KREEP, ice in polar cold traps and helium-3 in the regolith.
Fly down through the dead atmosphere as far as the lethal storm deck near 25 km. Live weather, auroras and the Ridge Fires on the night side, and a debris belt to salvage in orbit.
A civilian ore buyer out on the lunar plain, a short hop from the home landing region. Set down on one of five pads, let the automatic assay grade your load, and sell every material you can mine at belt prices without leaving the Moon.
Real MESSENGER terrain, from the Caloris basin to ice hiding in the shadowed polar craters. The 700 K dayside cooks a stock suit, so research a cooled one first. No station: this is frontier.
Magellan terrain under 92 bar of crushing atmosphere: Maxwell Montes, Maat Mons and Beta Regio. Research a pressure hull and a hardsuit before you descend, then let the wind turn your turbines.
Fly solar science contracts that pay up to 70,000 credits for holding close to the star. Heat builds with every minute, and ships that push too far don't come back.
Nitrogen, methane, carbon-monoxide and carbon-dioxide ices. Sunlight is too weak for solar panels, so hubs out here run on a 2 kW fission unit.
An industrial refinery with ten enclosed hangars and six open ore berths for Miners. It buys every mined material, sells refined metals and Alloy Parts, and is the only shipyard that builds Miners. Below it, Ceres has surveyed landing areas at Occator, Ahuna and Haulani.
Stony, carbon-rich and metallic fields near Ceres, plus a procedural catalog across the main belt and Jupiter's L4 and L5 Trojans with 40 to 400 rocks each.
A small beginner field of 128 rocks inside a 500 km swarm. The closest place to learn capture mining without crossing the belt.
Fly an orbital survey for a 15,000-credit contract. Since the terraforming effort went silent, the poles have turned green, and no one has gone down to ask why.
The landers that got there first are still there: MESSENGER and BepiColombo on Mercury, the Venera and Vega landers on Venus. Look, don't touch. Documenting them earns Archive Cores.
Ships One starter · three for sale
Every pilot starts with their company's Transport. Explorers and Combat ships are sold at Meridian, and Miners at Cinder Exchange. Each hull has a walkable interior, a real cockpit, and RCS, main and landing engine banks.
Vehicles Built at your manufacturing plant
Surface work is done by machines you build and command. Rovers take RTS-style orders, recharge at your hub, chargers or garage, and refuse jobs they can't come back from.
Drive it yourself, with three friends aboard. It charges and refills suits on the move, and hold-down thrusters help it brake and turn in low gravity. It fits in one Transport container slot.
The workhorse: builds, mines, hauls, grades roads and levels ground. One comes free with every claim.
Repairs, maintenance and habitat filter service, with a light step and a long reach.
Carries oxygen from your plant to modules and landed ships. Set it to Auto Deliver and stop worrying.
Your eye in the sky and your build cursor. Fly it, run an 8-second lidar sweep for deposits, and switch the feed to night or thermal. It rides home aboard your ship.
Ironwatch and Freehold bases get their own rover and drone designs; stats are identical for every company. Rovers recharge in two minutes, or one in a Rover Garage, and a claim can run up to 32 of them. Communication towers extend radio range for drones and rovers by another kilometer.
Base building Survey drone · BUILD sidebar
Launch the survey drone and fly it over your claim. Pick a structure from the BUILD sidebar, place it, and your rovers do the building. Five pages: Core, Power, Life, Modules and Ground.
| Structure | What it does | Base Parts |
|---|---|---|
| Claim hub | Anchors the claim; radio, charger and nav light | Free |
| Stockpile | 2,000 kg of storage; the first one releases 200 parts | 5 |
| Solar array | Six panelsThree-panel version: 22 | 30 + 1 Alloy |
| Battery bank | Carries the base through night and eclipse | 25 |
| Power pole | Cables run up to 40 m between polesCable: 1 part per 10 m | 5 |
| Habitat module | Pressurized room; join modules with tubes and an airlock | 60 |
| Oxygen plant | Extracts oxygen from regolith and ice | 60 |
| Electrolyzer | Splits water into oxygen and hydrogen | 70 |
| Mining pad | Sorts boulders into ore and regolith | 15 |
| Manufacturing plant | 50 parts from 100 kg of rock and 100 Wh; builds rovers and Alloy Parts | 150 |
| Storm shelter | 95% flare protection under a regolith berm | 150 |
| Communication tower | Linked 1 km relay for building outside your claim | 27 + 3 Alloy |
| Research lab | Turns Archive Cores into new technology | 150 |
| Farm module | Grows crops that keep growing while you're offline | 70 |
| Structure | Company | Parts |
|---|---|---|
| WatchtowerArmed autocannon post | Ironwatch | 250 |
| Algae bioreactorOxygen and food paste from water and power | Freehold | 90 |
| Drone roostFour build and repair drones | Aurelian | 120 |
Signature structures need research and are limited to one per base. Beyond these, the catalog covers water recyclers, Sabatier reactors, ice melters, regolith printers, warehouses, rover garages, landing pads, medical bays and more. Base Parts sell at stations for 100 credits each; costs are prototype values.
Survival Suit Mk I · 400 Wh battery
Your suit, your ship and your base each keep their own books on oxygen, power and wear. Miss a payment and the vacuum collects.
A few times a day, the Sun lets go. You get eight minutes to reach shelter, or thirty with a space-weather station at your base. The closer you are to the Sun, the worse the dose. Being caught in the open is fatal.
Suits start empty and refill in two minutes inside a ship, station or pressurized module. Base air starts at zero, so you have to make it.
A hiss means a puncture. Patch it fast. Strikes can also breach module walls, and then a rover or your drill has to seal the leak.
Mercury's dayside cooks a stock suit, and Venus crushes one. Research cooled suits, hardsuits and pressure hulls before you go.
MREs, water pouches, trauma kits and anti-rad doses from station vendors and the clinic, or grow your own food and treat radiation in a medical bay.
The suit battery heats and cools you. Moon dust grinds at the seals, so brush down at the suit stand and repair wear at the workbench.
Threats New in pre-alpha · in testing
The Moon has its own residents, the companies are at war, and the best salvage is guarded. Bring friends.
Self-replicating military machines were sent to the Moon a century ago. They are still building. Fight through walkers, rim guns and repair units to crack the Foundry's vault.
Talons stalk the ground, Needles launch from their racks, and Menders keep the others running. Their Machine Cores feed the research tree, if you can carry them home.
Lunar derelicts, the debris belt around Earth, heritage sites and Foundry vaults all yield Archive Cores. Feed them to a Research Lab to relearn armor, smelting, propellant chemistry, cooled suits, Venus hardsuits and more. Twenty-one technologies are live today.
Media Unreal Engine 5.8 · in-engine captures
Pre-alpha captures from the current build, plus production renders. Nothing here is final.
Field guide Hold F1 in game for controls
New to the system? Follow these steps from registration to your first breath without a helmet. Every key can be rebound, and gamepads and HOTAS setups are supported.
From the main menu choose Play, then Characters, then New Character. Pick a name (3 to 24 characters) and a company, then press Join & receive Transport. You get 100,000 credits and a kit of 4 MREs, 6 water pouches, 2 trauma kits, 2 anti-rad doses and two packs of seeds.
You wake in Meridian's arrivals atrium. Open the suit computer with Tab, go to the Station tab and choose Retrieve ship. Follow the hangar marker through the lift and corridors, then press E at the hatch and again at the pilot seat.
Press P for power, I for engines and R to request departure. The bay opens. Ease out on RCS with WASD, Space and Ctrl, raise the gear with PgDn, then press B to switch to Main.
Open the suit computer's Jobs tab. Your company posts Earth–Moon consignments (12,000 credits for a full Transport), a Mars survey and solar science runs.
Open the navigation computer with M and pick a destination: Lunar Station, the Moon or the Earth L1 Field. Press J to cycle route styles. Direct is fastest; Economy saves fuel but can take hours. Press V to engage. Take manual control at any time; X cancels the route.
The autopilot stops about 1.8 km out. Tap G for an autopilot docking (about 40 seconds) or hold G to fly it yourself. Hangars are first come, first served, with a queue if all ten are taken.
On the map, pin a Moon landing site with Alt+click and fly to the hold point above it. Press N for landing assist. Once you're down, shut the engines off, put your helmet on with K and walk out. Press O to fly the drone, B for the BUILD sidebar, 1 for the free claim hub and 2 for the stockpile.
Build solar arrays (7) and a battery (F6) and wire them with power poles. Add a mining pad (3), an oxygen plant (8), and a habitat module and airlock from the Modules page. Build an Oxygen Rover and set it to Auto Deliver, or draw from your ship's 600 kg reserve. At 60 kg of O₂, take off your helmet.
Defaults for keyboard and mouse. Rebind anything under Options. Gamepad: A interact, X flight assist, Y engines, B cancel route; sticks translate and look, bumpers roll, triggers move up and down. HOTAS devices support up to 8 axes, 128 buttons and 4 hat switches each.
| Cargo | Where | cr/kg |
|---|---|---|
| Mare basaltwith ilmenite | Any station | ~8 |
| Highland anorthosite | Any station | ~5 |
| KREEP basaltwith thorium | Any station | ~14 |
| Asteroid rockstony · carbon-rich · metallic | Any station | 8 · 9 · 31 |
| Water ice | Cinder, Lunar Refinery | 6 |
| Triton icesN₂ · CH₄ · CO · CO₂ | Cinder, Lunar Refinery | 3 · 7 · 5 · 4 |
| Salts · clays | Cinder, Lunar Refinery | 4 · 3 |
| Regolith | Any station | 2 |
Rock is graded: you get 2 credits per kg plus the value of the minerals in it, so the figures above are typical lots. Stations also buy refined metals, helium-3 and hauled propellant at 60% of their price.
| Item | Credits |
|---|---|
| Liquid hydrogen · oxygenper kg | 2.7 · 0.95 |
| Base Partseach, 1 kg | 100 |
| Alloy Parteach, 10 kg | 500 |
| Drone fuel refill | 100 |
| MRE ration · water pouch | 40 · 10 |
| Trauma kit · anti-rad dose | 150 · 120 |
| Seed packs | 10–20 |
| Carbine · magazine | 2,500 · 60 |
| Radiation treatmentper mSv, clinic | 3 |
| Contract or hull | Credits |
|---|---|
| Earth–Moon consignmentper container slot; the Transport carries six | 2,000 |
| Mars orbital survey | 15,000 |
| Solar sciencecloser bands pay more | 4,000–70,000 |
| Maintenance EVA repair | 750 |
| ExplorerMeridian shipyard | 60,000 |
| MinerCinder Exchange shipyard | 90,000 |
| CombatMeridian shipyard | 120,000 |
You start with 100,000 credits. Jobs come from your own company. Prices are prototype values and will change.
Suits start empty. Stand in any safe interior (ship, station or pressurized module) and it fills in about two minutes, or press U to refill from your ship. A full suit lasts about an hour.
Main won't fire with the landing gear down. Raise it with PgDn, then press B to cycle RCS, Main and Landing.
Economy is the default route style and trades time for fuel. Press J in the map to switch to Balanced or Direct.
Every burn costs propellant, including flight assist. A Transport pilot can come to you: open your connector port with Y and they transfer fuel with T. Stations sell liquid hydrogen at 2.7 credits per kg and liquid oxygen at 0.95.
You have eight minutes. Get into a station if you can, or into the best shelter nearby: a storm shelter gives 95%, a bermed habitat 85%, Transports and Miners 80%, Combat ships 75% and Explorers 70%.
That's a micrometeorite puncture. Press Z to patch it. You carry three patches, and the habitat workbench repairs suit wear with Base Parts.
Rovers refuse work they can't get back from: about 550 m from the nearest charger for a medium rover, or 1,150 m for a mini. Build a charger closer to the job. Radio reaches 1 km from the hub, and communication towers extend it.
A docked ship goes into storage; get it back from the suit computer's Station tab. A ship in flight keeps flying its route. An active base keeps running power, production, research and crops while you're away. For long breaks, put it into dormancy from the suit computer's Base tab.
Claim a replacement through insurance for a tenth of its value: 6,000 credits for a Transport.
Hold the right mouse button with your helmet on to open the helmet camera and use the mouse wheel for 2×, 5× or 10× zoom. The middle mouse button cycles normal, night and thermal views, and End sets the visor shade.
Pick the one you like the look of. Ships, rovers and structures perform the same for everyone; each company has one economic edge and its own signature structure.
Hold F1 at any time. Rebind anything from Options in the main or pause menu.
Roadmap Pre-alpha · subject to change
Factions, new worlds, research and the first hostile machines are in the build and waiting on playtests. Next come company home stations, civilian settlements, traders and pirates, and the long road to Mars.
The roadmap shows current plans, not release dates. Order and scope will change as we playtest. Items marked In testing are built into the pre-alpha and still being tested; items marked Research are still being explored and may look very different when they ship.
Development Two Towers Studio
Oxygen Debt is in pre-alpha on dedicated servers. Playtesters can download the launcher now: it installs the game, keeps it up to date and connects you to the playtest server.
Windows 10 or 11, 64-bit. The launcher is about 60 MB and the game is a 4 GB download; updates fetch only what changed. Windows may say the app is unrecognized because the launcher is not code-signed yet: choose More info, then Run anyway.