Humans

Lazarus Complex Complete Guide: From Seed Vault to First Human

Fixed the power on the roof, but the racks still say No Power? See how to power the Lazarus racks.

The Lazarus Complex is the endgame system where everything comes together. All the resources you've been gathering, all the levels you've been grinding — this is where they pay off.

This guide walks through the entire process from preparation to your first successful human, including the notorious "not enough" error that frustrates so many players and the Early Access bugs that can cost you seeds if you're not prepared.

If you want a quick reference instead of a full walkthrough, see the Lazarus Complex Quick Reference Guide.

Getting In, Power and Other Questions

Short answers first. The steps for growing a human follow below.

What Is the Lazarus Complex?

The Lazarus Complex is the facility where you grow humans from seeds. It's the core objective of The Last Caretaker — you're literally bringing humanity back.

The process involves two key pieces of equipment:

• Lazarus Pod — a portable container. You place a Human Seed into the Pod at the Seed Vault, then carry the Pod back to the Complex.
• Lazarus Rack — a stationary incubation unit inside the Complex. You place the Pod into the Rack, supply resources, and the Rack grows the human.

Start with a repaired Lazarus Rack; you do not need all the racks running at once. Once a Rack is supplied with power, water, food, and memory items — and the stat thresholds are met — check the rack estimate before starting. How long a grow takes depends on the load: estimates in checked games ran from 1:00 to 2:20, and in play one human finished in about ten minutes.

The hard part isn't the cultivation itself. It's the preparation.

Before You Start: Preparation Checklist

Do not attempt a seed run until you have all of these ready. Lost seeds are permanent — there's no undo button.

Check every item. If anything shows as unmet on the rack's interface, fix it before you leave for the Seed Vault: the seed's countdown begins as soon as you pick it up (Step 6 has the details).

Step 1: Repairing Lazarus Racks

Nothing grows until a rack is fixed, and every rack asks for the same bill of materials.

Titanium and Carbon Fiber are the two that usually hold players up; this guide covers where both come from. Gold and Iron come out of ore, which the Ores & Mining guide explains.

One working rack is all your first human needs; fix more later if you want to grow several at once.

Short on Plastic, Glass or Rubber? The Dismantle Tool Guide shows what common scrap breaks down into.

Step 2: Power Setup (Growth Energy Estimate)

Wired up and still no power? Work through the Still No Power? checklist in the Lazarus power guide.

Option A: Generators (Simplest)

Gasoline-powered generators connect directly to the Complex. This is the fastest way to get power running, but you'll need a steady fuel supply.

• Connect generator output directly to the Lazarus Complex
• Have enough stored or generated energy for the rack estimate
• Keep gasoline stockpiled — running dry during cultivation is not recoverable

Option B: Solar Panels (Sustainable)

Solar panels can be placed on the Complex rooftop. They produce free power during daytime but nothing at night. Pair with batteries or a backup generator for 24/7 operation.

See our Solar Panel Guide for placement and output details.

Option C: Wind Turbines (Supplemental)

Wind turbines provide variable output based on weather. Best used to supplement solar panels for more consistent power, especially overnight.

Step 3: Fresh Water (Rack Estimate)

Corrected October 8, 2026: an earlier version of this guide gave 1,000 L; the screen reads 10,000 L.

Water infrastructure

• Water Pump — extracts water from a nearby source
• Water Purifier — the racks only take fresh water, so the pump's sea water goes through this first (the link shows the hook-up order).

Set this up before you start worrying about food. Water infrastructure takes time to build and you don't want to be scrambling for it when everything else is ready.

Step 4: The Food Pipeline (Soilforge → Food Processor)

This is the most complex part of the preparation. Food for the Lazarus Racks isn't something you pick up — it's something you manufacture through a two-step process.

Plan a specific profession with the Human Recipes guide.

The two-step food pipeline

Step A: Soilforge (Tier 10) — Converts raw Bio materials into Food Materials. Unlock this early — you'll want to start stockpiling Food Materials well before you need them.

Step B: Food Processor (Tier 10) — Converts Food Materials into finished food that the Lazarus Racks can use.

Complete Bio → Food Material table

The 13 food types and their stats

Each food gives different amounts of 5 physical stats: Height, Weight, Life Expectancy, Strength, and Intellect. Here are some key foods to know:

Why food variety matters

The Lazarus Rack has minimum thresholds for three physical stats:

• Height ≥ 30 cm
• Weight ≥ 20 kg
• Life Expectancy ≥ 10 years

If you only spam High-Fat, you'll max out Weight but Height and Life Expectancy will be nowhere near their thresholds. The rack will say "not enough" and refuse to start. You need a mix of food types that covers all three — see The "Not Enough" Problem below.

Step 5: Finding Memory Items

Memory items are physical objects scattered across the game world. They don't affect whether the rack works (that's food's job), but they shape the psychological traits of the human you grow.

Types of memory items

• Toys — found in residential areas and schools
• Letters — found in homes and offices
• Musical instruments — found in various locations
• Cameras — found in tourist areas and homes
• Books — found in libraries and residential areas
• Other personal objects — scattered throughout the world

How memory items work

The reference list has 10 mental trait types: Empathy, Communication, Patience, Discipline, Leadership, Adaptability, Creativity, Focus, Logic, Wisdom. All ten appear in checked screens, including Wisdom and Adaptability. Each memory item influences specific traits. Higher quality items have a greater effect — hover over items to check their trait values before collecting.

Combined with the 5 physical stats from food, the final trait profile determines the human's growth prediction. See the Human Recipes guide for profession requirements and the separate Star Child report.

Step 6: The Seed Run (About 2 Hours)

Repair the rack and check its power and fresh-water connections before retrieving a seed. Once the Pod is installed, confirm that the countdown has stopped.

Glass vials and seed containers marked “aged” or “empty” are not seeds and will not start a human. What the Aged Lazarus Vial and the seed containers are good for.

The "Not Enough" Problem (And How to Fix It)

This is the single most frustrating issue in the Lazarus Complex. You've gathered resources, repaired the rack, connected power and water, loaded food and memory items — and the rack still says "not enough".

Here's what's actually happening:

The game doesn't clearly communicate this. You see "not enough" and think you need more of what you already have. But the problem is usually that you're missing a type of food — not a quantity.

How to diagnose and fix it

• 1. Open the rack's interface and check each stat value individually
• 2. Identify which stat(s) are below their threshold
• 3. Add food types that raise the deficient stat — experiment one type at a time if needed
• 4. Make sure you've unlocked all available food types from the Food Processor
• 5. If all stats appear to meet thresholds but it still says "not enough," this may be a bug — see Known Bugs

Use our Lazarus Human Calculator to verify your setup before attempting a seed run.

Known Bugs and Workarounds

The Last Caretaker is in Early Access, and the Lazarus Complex has some known bugs that can cost you seeds if you're not prepared. These have been reported across multiple Steam Discussion threads.

Bug #1: Rack won't accept anything (most common)

Symptoms: All requirements appear met, but the rack refuses to start cultivation. Food, water, power, memory items — everything looks correct, but the rack won't accept the Pod or shows requirements as unmet.

Bug #2: Pod disappears after loading

Symptoms: Pod placed in rack but vanishes, or rack shows empty after loading. Less widely confirmed than Bug #1.

Suggested fix: Save and reload inside the Complex. If the Pod is truly gone, you'll need to retrieve a new seed.

General advice for avoiding bugs

• Always save before loading a Pod into a Rack. If something goes wrong, you can reload.
• Save inside the Complex — bug fixes require loading from a save made in the facility.
• Don't rush. Monitor the seed countdown and save before handling a potentially bugged rack.

Report bugs to Channel 37 via the Steam Discussion page.

Tips for Your First Successful Run

• Start with one rack. Don't try to repair and supply all 4 at once. Get one working, complete a successful human, then scale up.
• Level to 10 first. The Food Processor is essential and doesn't unlock until Level 10. Don't waste seeds attempting the process without it.
• Stockpile Bio materials early. You'll need multiple types — Bio Organic, Bio Light, Bio Waste, Bio Seaweed, Bio Dark, Bio Flesh — to create a diverse food portfolio. Start gathering these during normal exploration.
• Collect memory items as you explore. Don't make a dedicated memory item run — just pick them up whenever you see them during normal play.
• Do a dry run. Before retrieving a seed, go through the entire process mentally: rack repaired? Power connected? Water flowing? Food loaded? Stats above thresholds? Memory items placed? Everything green on the rack's interface?
• Save before the seed run. Save inside the Complex right before you leave for the Seed Vault. If something goes wrong, you can reload without losing a seed.

Frequently Asked Questions

Written for Early Access. Mechanics may change in future updates. This guide was checked against the community wiki as of April 2026. If you spot an error or have additional information, let us know.