The Forge - Smithing - IdleOn

Aleph

February 28, 2025

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The Forge in IdleOn allows you to turn Ores into Bars through Smithing, which are commonly used in crafting new items at the Anvil. The Forge becomes available once you have completed the early-game tutorial and also can be added to the World 1 Town Blunder Hills.

• How The Forge Works
• Smelting Ores and Bars
• Oil Barrels
• The Forge Upgrades
• The Forge Cards
• Forge Achievements
• Other Forge Boosts

Each character has their own Smithing Level that will increase their production speed and Smithing EXP gained when using The Forge.

At Level 18, you can purchase a Town Forge so that it is available in Blunder Hills. This forge is exactly the same as the one in the Mines.

How The Forge Works

When you click on The Forge, you'll be presented with a UI containing three slots.

The Ore Slot is where you deposit your Ores. As soon as they have been deposited, The Forge will begin turning them into Bars. All you have to do is wait!

The next slot is the Barrel Slot. Here you can place various Barrels that give special effects when turning Ores into Bars, like speeding up production or the chance to obtain multiple bars at once.

The third slot is where your newly crafted Bars are placed. Just click on them to drag them back into your Inventory, which you can then use for your crafting needs.

At the bottom of The Forge, you can click on the Deposit button, to automatically deposit all ores from your Inventory into the first Forge Slot. The Tap button allows you to move a max-stack of Ores from The Forge to your Inventory, and vice-versa.

There is also an Upgrade Tab, that allows you to unlock various boosts and bonuses when using The Forge. See below for all the bonuses.

Smelting Ores and Bars

When you use The Forge, it will smelt Ores into Bars. Each type of Bar requires a specific amount of Ores to transform into a bar.

As you start gathering rarer and rarer ores, the amount you need will steadily increase as well as the production time.

Ore	Bar	Ores Needed	Time
Copper Ore	Copper Bar	2	15 seconds
Iron Ore	Iron Bar	4	30 seconds
Gold Ore	Gold bar	7	60 seconds
Platinum Ore	Platinum Bar	16	200 seconds
Dementia Ore	Dementia Bar	40	400 seconds
Void Ore	Void Bar	100	750 seconds
Lustre Ore	Lustre Bar	250	1,300 seconds
Starfire Ore	Starfire Bar	500	2,000 seconds
Dreadlo Ore	Dreadlo Bar	1,000	3,100 seconds
Marble Ore	Marble Bar	4,000	6,000 seconds
Godshard Ore	Godshard Bar	15,000	15,000 seconds

 

Oil Barrels

Barrels can help with crafting Bars faster and more efficiently. However, they do have a chance to be consumed each time you forge a new bar, so you'll have to be topping them up constantly.

You don't have to use Barrels to forge Ores into Bars.

Item	Effect	How To Get
Glumlee's Special Tutorial Oil	Increases Forging Speed by 999% for the Forge Slot it's in. 200% chance to be consumed when a bar is forged.	Tutorial
Crude Oil	Increases Forging Speed by 15% for the Forge Slot it's in. 75% chance to be consumed when a bar is forged.	Blunder Hills Shop (W1)
Toxic Sludge	Increases Extra Bar chance by 20% for the Slot it's in. 60% chance to be consumed when a bar is forged.	Slime
Radioactive Waste	Increases Forging Speed by 30% for the Forge Slot it's in. 30% chance to be consumed when a bar is forged.	Anvil Tab 2
Eco Friendly Oil	Increases Forging Speed by 10% for the Forge Slot it's in. 30% chance to be consumed when a bar is forged.	Anvil Tab 1 (Unlocked via Tasks)
Magma Barrel	Increases Extra Bar chance by 40% for the Slot it's in. 50% chance to be consumed when a bar is forged.	Smolderin Plateau Shop (W5)
Plasma Barrel	Increases Extra Bar chance by 60% for the Slot it's in. 30% chance to be consumed when a bar is forged.	Spirit Village Shop (W6)

The Forge Upgrades

You can upgrade your Forge with a number of special boosts that cost coins. The cost of each upgrade gradually gets more expensive as you upgrade.

The Forge Cards

Whenever you take out smelted bars from The Forge, there is a chance for a card to drop.

There are two IdleOn Cards you can obtain:

• Fire Forge Card - obtained from the first tab of Forge Slots
• Cinder Forge Card - obtained from the second tab of Forge Slots

Below you can find all the cards for the Easy Resources set. The set bonus effect is % Skill Efficiency

Image	Card	Bonus		1	2	3	4	5
	Fire Forge Card	% Smithing EXP (Passive)	+4	+8 10 cards	+12 30 cards	+16 50 cards	+20 160 cards	+24 4590 cards
	Cinder Forge Card	% Smithing EXP (Passive)	+7	+14 10 cards	+21 30 cards	+28 50 cards	+35 160 cards	+42 4590 cards

Forge Achievements

When using The Forge, you can also obtain the following achievements. Some achievements can only be claimed by playing on the Steam version.

Icon	Achievement	Description	Rewards	Steam Exclusive
	Learn 2 Forge	Get the mining certificate from Glumlee	10 Gems 1hr time candy	YES
	Pro Gamer Move	Keep the oil. Precious, precious oil... SECRET: When doing the mining tutorial to obtain the Mining Certificate, do not use the special Oil to forge a Copper Bar.	10 Gems 1hr time candy	YES

Other Forge Boosts

You can also boost The Forge from other areas of IdleOn.

Name	Boost	From	Notes
Beeg Forge	+750% Forge Capacity	The Upgrade Vault	Access from World 1
Brimstone Forge Slot	Brimstone slots smelt bars 50% faster, and have +50% multi-bar chance, meaning you'll get extra bars for every ore! These MULTIPLY with forge upgrades, so they're always good!	Gem Shop	100 Gems (+15 per purchase)
Forge Stamp	+% Forge Capacity	Stamps	Obtained in World 6
Forge Cap Smuggling	Boosts Forge Capacity by a smoking hot 1.30x	Stamp Bribes	Access from World 1
Forge Capacity	+50% Forge Capacity	Arcade	Access from World 1
Godshard Card	+% Forge Capacity and Speed (Passive)	Cards	Access from World 3