One Hostile Planet
A seed makes every world reproducible. Difficulty shifts the archetype lottery, while weather, day and night keep changing the terms.
Expedition file / 2085
EveryLast One
A strategy game with survival at its core.
Your crew members will often die, and sometimes even entire colony may be lost.However, it is up to you to make the most out of each defeat.
Mission brief
One world. One crew. No clean reset.
Command a failing orbital reserve above one procedurally generated planet. Choose the first landing, bring people and supplies down, then keep the colony alive one deliberate turn at a time.
- 10
- Planet Archetypes
- 249
- Authored Biomes
- 9
- Material Properties
- 100%
- Turn-Based
01
Turn-Based Command
Build teams from named specialists. Their skills, mood, relationships, and command shape every operation.
Survival First
A decaying ship, life support, disease, and the weather. Crew will die. Colonies can collapse.
Current alpha systems
World Memory
Playable in alphaSignificant decisions and consequences enter a linked chronicle. The colony remembers who did what — and why it mattered.
Living Environment
Playable in alphaDay/night cycles, deterministic storm schedules with forecasts, and toxic or irradiated hotspots.
Epidemics
Playable in alphaSIR-model disease: emergence, spread, detection, and mortality — countered by clinics, treatment, and quarantine.
Command & Respect
Playable in alphaA 12-grade rank ladder and chain of command. Respect is earned per relationship — promote the wrong person and feel it.
Mood & Traits
Playable in alphaStress, trauma, and explained satisfaction channels. Traits crystallize from what each character actually lived through.
Social Network
Playable in alphaDirectional bonds, mentorship, and rivalries that change how teams perform — and where trouble starts.
Factions & Secession
Playable in alphaDiscontent organizes into factions. Settlements can break away — a contest of will versus force.
Sectors & Delegation
Playable in alphaGovernors run administrative sectors while experience shapes the quality and risk of automated exploration and logistics.
Procedural Materials
Playable in alphaUnknown raw materials revealed axis by axis through analysis. Recipes only match properties you have uncovered.
Tactical Combat
Framework in alphaAn AP-based framework for cover, guard, and withdrawal already feeds consequences back into the colony. Tactical depth is still expanding.
Crew manifest
People, not counters.
Individuals are represented by specialists — named characters with skills, professions, moods, and histories. Teams built from them carry out the colony's critical operations.
Current alpha tuning
5×
Colonists
1×
Specialist
Recruiting converts settlement population into a named specialist. Your colonists are both your workforce and your recruitment pool.
Colony orders powered by specialists
SurveyMineBuildAnalyzeProduceTransportPatrolResearchTrainPromote
- Use-based skill growth plus a separate education channel
- Traits crystallize from each character's service record
- Mood, stress, and trauma with explained satisfaction channels
- Directional relationships — bonds, mentorship, rivalry
- 12-grade command ladder where respect is earned per relationship
- Permanent cryo losses and a chronicle that preserves major consequences
Illustrative crew dossiers
Chief Medical Officer
StressedDr. Elena Martinez
Trait / Compassionate
Steadies morale around her — but absorbs stress from every loss
Containing an outbreak at the clinic
Lead Engineer
FocusedJames Chen
Trait / Perfectionist
Meticulous work, slower pace — and friction with improvisers
Triaging the decaying ship's modules
Colony Leader
AlertCommander Aria Okafor
Trait / Inspiring
Rallies the chain of command in crises — expects the same in return
Storm forecast puts landfall two turns out
Field Scientist
AnalyzingDr. Yuki Tanaka
Trait / Patient
Thorough analysis, deep revelations — rarely first to report
Unlocking an unknown compound's exotic properties
Eight skill domains
Science
Research & analysis
Construction
Building & fabrication
Operations
Running settlements
Medicine
Treatment & epidemics
Combat
Tactical effectiveness
Extraction
Mining & deposits
Logistics
Transport & supply lines
Recon
Exploration & scouting
Material intelligence
Nothing comes labeled.
Each world generates unfamiliar materials. Analysis reveals their properties, and production can only use what the colony understands.
9
Hidden Property Axes
28
Raw Materials per World
4
Material Categories
264
Biomes to Prospect
01Deposit location
Discovery
Exploration uncovers a deposit. Its contents remain unknown until a specialist begins analysis.
02Basic axes
Field Analysis
Analysts work the deposit and reveal the basic property axes first: density, hardness, melting point, conductivity.
03Exotic axes
Laboratory
A laboratory digs into the exotic layers: reactivity, toxicity, flammability, energy content, radioactivity.
04Knowledge gate
Processing
Research unlocks processing. Known properties qualify materials for recipes, parts, and fuel.
Ten archetypes, 264 authored biomes — every world prospects differently.
Terran
Oceanic
Jungle
Desert
Tundra
Frozen
Ice
Scorched
Volcanic
Barren
What you learn feeds straight back into survival: fuel recipes burn in the energy report, fabricated parts keep buildings, modules, and equipment running, while transports and supply lines move it all where it is needed.
Planetary survey
Ten ways for a world to resist you.
A seed makes the world reproducible. Difficulty shifts the odds toward harsher archetypes, or you can pin one yourself.
01 / 10live generated survey
Archetype record
Terran
ViableTemperate worlds with near-standard pressure, moderate moisture, and standing water. The kindest draw the lottery offers.
- Day range
- -3°C to 32°C
- Night range
- -8°C to 22°C
- Atmosphere
- 0.7 – 1.3 atm
- Moisture
- Moderate (40 – 60%)
Standard500 pts
Gentle draw — the harshest worlds stay off the table
Harsh420 pts
Harsher worlds likely, mild ones a rare draw
Extreme350 pts
The mildest worlds are off the draw entirely
This browser survey runs the game's actual procedural world pipeline — the same seeds, climate model, and biome catalog. In-game worlds can reach 6,424 × 3,212 locations and support data layers for temperature, moisture, elevation, toxicity, radiation, and seismicity.