How to Make an Atomic Bomb in Your Garden Progression System Guide
Updated 2026-06-13

Overview of the Progression System
The progression system in How to Make an Atomic Bomb in Your Garden is a layered loop of resource gathering, stealth, and technological advancement. Unlike traditional simulation games, your path to building a nuclear device is gated by both material requirements and the ever-present threat of discovery. This guide breaks down each phase of progression, from your first dollar to the final assembly.
New to the game? Read our beginner guide first to understand the basic controls and survival mechanics.
Phase 1: Initial Funding and Setup
Your first goal is to secure seed money. The game starts you with a small savings account and a rusty shed. Progression begins with acquiring cash without raising suspicion.
Income Sources
- Day Job: Work a standard 9-to-5 for steady, low-risk income.
- Side Hustles: Sell scrap metal or offer "science tutoring" online. These yield more cash but increase your suspicion meter.
- Gambling: Visit the local racetrack. High risk, high reward, but a single loss can set you back hours.
Essential First Purchases
- Basic Workbench: Unlocks the ability to craft simple tools.
- Soundproofing Kit: Reduces noise from your early experiments, lowering neighbor suspicion.
- Fake ID: Required to purchase restricted chemicals from hardware stores.
Funding Priority
1. Basic Workbench ($500)
2. Soundproofing ($300)
3. Fake ID ($1,200)
Avoid These Early
Don't buy the premium Geiger counter yet. It's expensive and useless until Phase 3.
Phase 2: Component Hunting and Stealth
Once you have funds and a basic workshop, you must acquire rare components. This phase is the core of the progression system.
The Search Loop
- Scan the Classifieds: Look for estate sales, government surplus auctions, and "junkyard specials."
- Travel to Locations: Each location has a risk level. Abandoned factories are high-risk but contain top-tier parts.
- Barter or Steal: You can negotiate prices or attempt to sneak items out. Failed theft attempts alert the authorities.
Key Components to Find
- Beryllium Reflector: Found in old X-ray machines. Check hospital auctions.
- High-Explosive Lenses: Military surplus stores, but require a high "Charisma" stat to purchase.
- Plutonium Core: The rarest item. Only obtainable through a multi-step quest involving a corrupt physicist.
Avoid the "Neighbor Alert" meter. If it fills, your neighbor calls the police. You'll lose all components found that day. Check our stealth guide for tips on staying under the radar.
Phase 3: Assembly and Safety
With all components in hand, you must assemble the device. This is a multi-step crafting process with no room for error.
Assembly Steps
- Machine the Reflector: Use your lathe to shape the beryllium. Requires the "Machining" skill (level 3).
- Wire the Detonators: A delicate process. One wrong connection and you'll blow your shed (and yourself) up.
- Insert the Core: The final step. The game triggers a tense minigame where you must lower the core into place without dropping it.
Safety Precautions
- Lead Lining: Upgrade your workshop walls to prevent radiation leaks.
- Ventilation System: Prevents toxic fumes from accumulating.
- Insurance: Yes, you can buy insurance. It's expensive, but it covers accidental detonations.
| Component | Skill Required | Failure Consequence |
|---|---|---|
| Reflector | Machining 3 | Loss of component |
| Detonators | Electronics 2 | Explosion (game over) |
| Core | Steady Hands 4 | Radiation poisoning |
Phase 4: The Final Countdown
After assembly, you must transport and detonate the bomb. This is the endgame progression step.
Detonation Options
- Public Display: Gain fame and a spot in history, but guarantee arrest.
- Secret Detonation: Detonate in a remote location. Less fame, but you can escape and play New Game+.
- Sell the Bomb: A hidden option for pacifists. Sell the completed device to a foreign government for a massive payout.
Post-Game Progression
Once you complete the game, you unlock New Game+ with:
- Retained skills and a portion of your cash.
- Higher difficulty (more aggressive neighbors, FBI surveillance).
- New components for an even larger device.
For a complete list of all upgrades and their costs, see our upgrades guide. If you're stuck on a specific quest, our walkthrough has detailed step-by-step instructions.
Progression Tips and Tricks
Mastering the progression system requires balancing speed with caution. Here are final expert tips:
- Always save before a risky action. The game has no autosave during theft sequences.
- Invest in "Charisma" early. It opens up dialogue options that let you buy restricted items legally.
- Don't ignore the "Mental Health" stat. If it drops too low, you'll make mistakes during assembly.
- Use the "Vacation" option. Taking a week off from the project resets suspicion meters and restores mental health.
Quick Tips
- Buy soundproofing first.
- Save before every theft.
- Level Charisma to 3 early.
Common Mistakes
- Rushing to buy expensive tools.
- Ignoring neighbor complaints.
- Forgetting to buy insurance.
With this guide, you'll navigate the progression system efficiently and achieve your goal of making an atomic bomb in your garden. Good luck, and watch your step!
Related pages
- Achievements Guide— Complete guide to all achievements in How to Make an Atomic Bomb in Your Garden. Learn how to unlock every trophy, from funding your project to detonating the final bomb.
- Crafting Guide— Learn how to make an atomic bomb in your garden with our complete crafting guide. Covers rare parts, tools, assembly steps, and avoiding detection. Essential for every aspiring backyard scientist.
- Currency Guide— Master the economy of How to Make an Atomic Bomb in Your Garden. Learn how to earn, save, and spend currency to fund your nuclear project without getting caught.
- Farming Guide— Master the art of resource gathering in How to Make an Atomic Bomb in Your Garden. Learn how to farm funds, parts, and avoid suspicion with our complete farming guide.
- Gear Guide— Discover the essential gear and tools in How to Make an Atomic Bomb in Your Garden. Learn what you need to gather, craft, and survive your nuclear project.
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