- The Alters Last Variable scientist story focuses entirely on Jan Scientist, the lone survivor who remains behind on the planet to study the mysterious Oasis biome.
- Four specialist Alters—Jan Geologist, Physicist, Chemist, and Biologist—must be cloned to handle advanced research and construction.
- Planetary cycles dictate gameplay, alternating between a cool exploration phase and a 13-year hot phase that forces the crew into cryosleep.
- Decisive ending choices determine the ultimate fate of the crew and the philosophical legacy of Jan's scientific obsession.
The Alters Last Variable Scientist Story Premise
The narrative of this paid expansion shifts focus away from the collective escape of the base game, centering instead on the solitary path of Jan Scientist. Having made the fateful decision to remain on the hostile planet, Jan must utilize the underground research base and advanced cloning technology to unlock the secrets of the Oasis—a unique, resilient reference biome at the heart of the planet's ecosystem.
This campaign spans approximately 20 hours of tactical survival, base expansion, and psychological tension. As Jan Scientist, you do not just fight the elements; you wrestle with the ethical boundaries of creation, scientific obsession, and the physical toll of long-term survival.
| Campaign Feature | Details |
|---|---|
| Protagonist | Jan Scientist (remains on the planet) |
| Primary Goal | Complete Oasis research and manage the ENC Generator |
| Key Threat | 13-year hot phases, earthquakes, and radiation |
| Core Loop | Explore cooldown zones, build base, sleep through hot phases |
This expansion functions as a separate campaign and does not inherit your base-game save file. However, completing the original campaign of The Alters on Steam is highly recommended to understand the relationships and emotional weight of Jan's decisions.
Cycle-by-Cycle Narrative Walkthrough
The story of Jan Scientist progresses through structured planetary cycles. Each cycle requires balancing main story quests with strict resource deadlines to prepare for the inevitable cryosleep phase.
Cycle 1: The First Branch
Following the death of the Old Scientist, Jan Scientist bakes a plan to repair the ruined Research Lab. After establishing a basic Metals Outpost, you research the New Branching Procedure to clone your first Alter. You must gather three biological samples from the Oasis, analyze them, and build both the Sample Analysis Module and the Cryosleep Chamber within a strict 14-day deadline.
Cycle 2: Oasis 2.0 & Field Labs
Upon waking, you discover root barriers blocking deeper Oasis paths. After researching root-drilling techniques, you construct the first Field Laboratory in Rocky Valley. Assigning a specialist Alter to this external lab allows them to gather long-term data, though they will age while Jan Scientist rests in cryosleep.
Cycle 3: The Proxilium Breakthrough
With the discovery of Proxilium, base engineering expands. You must construct a Proxilium Tank and a Splitter to process advanced materials. Upgrading your Sample Analysis Module with a Magnetometer allows you to complete a deep 12-hour Magnetometric Analysis, pushing Jan closer to understanding the planetary core.
Advanced Cycles: Megafluid & High-Tier Terraforming
As the planet's defensive reactions intensify, you deploy Tier III Terraformers in Far Hill and Waterfall. Collecting data from multiple Field Labs unlocks Megafluid production. You must balance high-radiation exploration sweeps with base maintenance to assemble the massive ENC Generator.
| Main Quest | Key Objective | Resource / Time Cost |
|---|---|---|
| Famous Last Words | Bury Old Scientist, inspect lab | 10 Metals (Repair Kit) |
| Forced Dormancy | Build Cryosleep Chamber | 50 Metals, 65 Rapidium |
| Root of the Problem | Research root-barrier drilling | 2 Working Hours |
| Colossal Energy | Install Tier III Terraformers | 90 Metals, 200 Rapidium, 75 Megafluid |
Never spend your starting Metals on optional base decorations or early comfort modules. Keep a reserve of at least 10 Metals on Day 1 to ensure you can craft the Repair Kit needed to unlock the Research Lab.
Specialist Alters and Scientific Roles
To advance The Alters Last Variable scientist story, Jan Scientist must clone specialized versions of himself. Each specialist Alter possesses unique bonuses that accelerate specific research branches and base tasks.
Jan Geologist (S-Tier)
- Specialty: Minerals, root barriers, and deposit extraction.
- Efficiency: 50% faster Metal mining.
- Story Role: Leads anomaly investigations and early Oasis mapping. Highly adventurous and enthusiastic.
Jan Physicist (A-Tier)
- Specialty: Advanced instruments and base maintenance.
- Efficiency: 50% faster Workshop crafting.
- Story Role: Manages Splitter and Mass Spectrometer projects. Needs professional recognition to stay motivated.
Jan Chemist (A-Tier)
- Specialty: Rare fluids and Field Lab acceleration.
- Efficiency: Completes Field Lab research in 6h 15m (vs 10h).
- Story Role: Processes Phased Rapidium and Megafluid. Pragmatic, quiet, and highly analytical.
Jan Biologist (A-Tier)
- Specialty: Greenhouse, medical, and ecological response.
- Efficiency: 100% Greenhouse speed, 8x healing speed.
- Story Role: Explores biological mutations and radiation recovery. Idealistic but emotionally fragile.
When you assign an Alter to a Field Laboratory, they leave the base permanently for that cycle. Ensure you complete their personal conversations and outstanding workshop tasks before sending them out, as they will age and remain inaccessible for daily base chores.
Underground Base and Cryosleep Preparation
The underground base serves as your shield against the planet's extreme climate. Survival requires strict adherence to a logistics checklist before triggering the end of each exploration phase.
| Preparation Category | Requirement | Failure Consequence |
|---|---|---|
| Cryosleep Organics | 50 Organics per person in base | Inability to enter cryosleep / Game Over |
| Base Maintenance | Structural repairs & power balancing | Mid-cycle blackouts and module damage |
| Surface Cleanup | Dismantle threatened surface extractors | Permanent loss of construction materials |
| Crew Readiness | Feed, heal, and resolve Alter conflicts | Alter Revolt and halted production |
Treat your Organics reserve as completely untouchable during the final three days of a cycle. Spending your Organics on optional Greenhouse experiments or high-tier food recipes can leave you short of the threshold required to put your crew into cryosleep.
Endings, Final Choices, and Achievements
The climax of The Alters Last Variable scientist story occurs after assembling and activating the ENC Generator in Rocky Valley. Jan Scientist descends into the deepest sector of the planet to make a final, defining decision regarding the Oasis project.
The Two Concluding Paths
- Ending 1: Create a Successor Jan accepts the model of scientific succession. By cloning a new Alter and leaving them under the guidance of JanBot, Jan ensures that the research program survives his own lifetime. Obsession wins over mortality, viewing the pursuit of knowledge as an infinite chain of created lives.
- Ending 2: Break the Cycle Jan rejects the endless loop of cloning and research. Recognizing the ethical cost of creating lives simply to serve as tools for a hostile planet, Jan shuts down the succession protocol. He accepts human mortality and leaves the Oasis's ultimate questions unanswered.
Expansion Achievement Checklist:
- Space Gardener: Place the first Terraformer.
- Mastering Rapidium: Begin producing Phased Rapidium.
- Mix and match: Start production of Proxylium.
- Substance Genius: Start production of Megafluid.
- Wait, you can do that?: Create the same specialist Alter type for a second time.
- Caring after all: Successfully complete all four specialist Alters' personal storylines.
- The reason I stayed: Finish the Last Variable DLC campaign.
The game creates a reliable autosave immediately prior to the final conversation with JanBot. You can complete the game, experience one ending, and reload this autosave to view the alternate conclusion without replaying the entire 20-hour campaign.
Frequently Asked Questions
Q: Do I need to own the base game to play The Alters Last Variable?
Yes. Last Variable is a paid story DLC expansion, not a standalone game. You must own the original game on the same platform to launch it.
Q: What is the best creation order for the specialist Alters?
The optimal creation order is Geologist first (to secure early Metal mining), followed by Physicist (for Workshop crafting and Splitter research), Chemist third (for Field Lab speed), and Biologist last.
Q: How do I prevent my Alters from revolting?
Ensure you keep their morale high by building comfortable Dormitories, resolving their personal story incidents, feeding them regularly, and avoiding overworking them during high-radiation cycles.
Q: Can I miss any achievements in the scientist story?
Yes. 'Caring after all' is highly missable if you activate the ENC Generator before completing all four specialist Alters' personal storylines. Ensure you resolve all conversation icons before the final phase.