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simgrammar the grammar of simulation

core loop

land with a starter kit -> mine and smelt ore -> build an airtight frame -> pipe, filter, and heat a breathable atmosphere -> power and automate with logic chips -> expand while fixing pressure, fire, and temperature failures

design notes

The atmosphere is the main simulated system: each sealed volume and pipe network carries a mix of gases with temperature and pressure, so heating a room raises its pressure, mixing fuel and oxygen can burn or explode, and a pressure difference across a wall can blow it out. Survival needs are deliberately front-loaded; later play is building plant that keeps the atmosphere stable, then automating it with IC10 chips programmed in an assembly language. The game has been in early access since 2017.

relations

12 stored edges
uses

Fluid and gas simulation

Rooms and pipe networks hold mixtures of oxygen, nitrogen, carbon dioxide, volatiles, pollutants, and water with pressure and temperature; gases mix, and combustion consumes fuel and oxygen and releases heat.

core
uses

Fluid pipe networks

Pipes, pumps, filtration units, mixers, and regulators route gases between devices; pipes and tanks fail when pressure exceeds their rating.

core
uses

Heat transfer

Gas temperature changes pressure and habitability; radiators, heat exchangers, heaters, and coolers move heat between pipes, rooms, and the planet's atmosphere.

core
uses

Survival meters

Early survival requires breathable gas, food, water, and suit temperature; suits carry tanks and filters until a habitat is sealed.

core
uses

Crop cultivation

Hydroponic plants need light, water, and suitable gases, and exchange carbon dioxide for oxygen.

supporting
uses

Building placement

Frames, walls, pipes, and devices are placed on a grid piece by piece, and placement decides airtightness.

supporting
uses

Player programming

IC10 chips run player-written assembly that reads and writes device logic values such as pressure and temperature.

supporting
uses

Power grid

Solar panels, generators, and batteries feed cable networks; overloaded cables burn out.

supporting
uses

Production chains

Furnaces and arc furnaces smelt ore into ingots, and autolathes and other fabricators turn ingots into kits.

supporting
uses

Resource extraction

Ore is mined from deformable voxel terrain.

supporting
uses

Signal circuits

Logic readers, writers, memory, and sensors chain devices without code.

supporting
uses

Structural integrity

Walls hold limited pressure differences; exceeding them causes fatigue and explosive decompression.

supporting

sources

1
(2026). Stationeers on Steam. Steam

provenance

runs in log/runs
2026-10-24
created2026-10-24-catalog-ggcatalog