Feed the Fire upgrade tree: upgrades and branch reveals
Learn how purchases reveal more of the Feed the Fire upgrade tree, from early log and cursor upgrades to lightning, spawners and later fuel unlocks.
The Feed the Fire upgrade tree expands with every purchase. Spend in-game money on a visible upgrade to reveal further options along the tree. Early entries include log improvements, earnings, cursor size and a shield; continued purchases uncover lightning, explosives, fireworks and spawners that feed your fire automatically.
How to open the tree and reveal more upgrades
- After a round ends, select UPGRADE on the results screen.
- In the FEED YOUR FIRE — every buy reveals more panel, choose a visible upgrade and check its price and effect.
- Buy the upgrade, then check the additional options that appear. Continue purchasing revealed entries to develop the branch further.
- Select START THE FIRE when you are ready for the next round.
Early upgrade entries
Early upgrades cover the following areas. The prices below are examples from early rounds; use the amount displayed on your current card.
| Upgrade or family | What appears in the tree |
|---|---|
| Organic Fire Value | An early $5 card says “Logs burn hotter (and grow a little)” and gives +10% fire value. |
| Shield | An early shield unlock appears at $6. |
| Cursor size | Increases cursor size; an early tier appears at $4. Further cursor-size tiers appear later. |
| Faster logs | Upgrades for faster logs. |
| Trees and organic spawners | Additional tree and organic-spawner purchases, including later spawner tiers. |
| Earnings | Upgrades that increase earnings. |
Fuel, spawners and feeding upgrades
Deeper purchases reveal new fuel types, additional automation and changes to how you feed the fire:
- Chain lightning / electrical chain: lightning fuel and further chain upgrades.
- Explosive barrel and explosive fuel: entries including “Adds an explosive barrel” and “Unlock explosive fuel.”
- Fireworks: firework unlocks and a firework spawner, with the placement prompt “Place your firework spawner.”
- Electric spawners: electric-spawner purchases and additional spawners as the tree develops.
- Combining explosions: an entry labeled “Explosions can combine.”
- Click feeding: “Click launches items at the fire” lets you send fuel toward the fire by clicking it.
- More preparation time: “More time before the rain” extends the time available before rain arrives.
For more on the automation options, see the Feed the Fire spawners guide.
Later-stage upgrade entries
After the Tempest and the level-50 fire, progression moves into a later planet/sun stage. Upgrade entries in that stage include:
- Power cells.
- Charged fueling.
- Tesla coils.
- Crystals and crystal upgrades: the crystal unlock describes crystals growing on the ground and paying more the longer you wait.
- Gas cans.
- Meteor showers.
- Heat shield.
- Meteor pool.
- Canister upgrades.
- Fuel cells.
- Conveyor belts.
- Hot crates.
Golden Log group prompt
Golden Log can display a group-membership gate. If that prompt appears, join the game's group, then return to open the entry.
Related Guides
Best Upgrades for Your Run
Match your next upgrade to hotter logs, more income, temporary rain protection or easier fuel handling.
Fuel Unlocks
Find lightning, explosive and firework unlocks in the upgrade tree, use their effects and recognize later fuel options.
Spawners and Automation
Buy and place spawners safely, distinguish fuel production from delivery and choose upgrades that reduce manual feeding.