Unlocked From Start
The Caverns
From IdleOn MMO Wiki
The Caverns is a feature located in The Hole, it includes 2 main parts.
Firstly the (image)Camp where your villagers are and second the Caverns, who are located in the hole.
All the Villagers(except (image)the explorer which you have at the start) are hidden in the caverns and must be rescued(clicked),
they can then be upgraded using 
Opals which will give them xp overtime and level them up unlocking new features.
Camp
Place where the villagers are
The Caverns
The caverns are located in the hole, they are unlocked by leveling up the explorer villager.
Shallow Caverns
The Shallow Caverns are the first set of caverns in The Caverns.
The Well
The Well is the first cavern in the hole and the Shallow Caverns, collect materials from buckets to spend on upgrades or Opals.
With the (image)Bar Expand-o-rama upgrade you can expand the cap every time you hit the max,
Once you reach 14 expansions you will need the (image)UBER Bar Expand-o-rama-hala expansions upgrade to expand further.
You can unlock new buckets from the (image)Engineer villager.
The Motherlode
The Motherlode is the second cavern in the hole and the second in the Shallow Caverns.
The (image)engineer vilager is located here
You mine the motherlode to get ore, after a certain amount of ore gained you can destroy a layer and gain an Opal,
then the efficiency required to mine the motherlode increases and so is the ore amount required.
You are capped at 5 layers broken per day, which is also shared with the other caverns related to skilling.
The Dawg Den
The Dawg Den is the third cavern in the hole and the third in the Shallow Caverns.
You fight hounds, each hound kill gives a score, hounds that stay alive for too long start to generate fear.
once the fear bar fills up you lose.
You can get Opals based on your highest score.
The Score Multiplier can be increased by charging the amplifiers by clicking on them, to reset you need to hold down.
You Unlock more Amplifiers From The engineer.
| Image | Name | Buff | Score |
|---|---|---|---|
| chat | is | this | real |
Monument Of Bravery
| Hours | Bonus |
|---|---|
| 1 | Swords deal MinDmg-MaxDmg damage |
| 80 | +2 additional Sword |
| 300 | You can Re-Throw 5 swords per story |
| 750 | +1 additional Sword |
| 2000 | You get 1 Retelling per story |
| 5000 | +1 additional Sword |
| 10000 | +10 Re-Throws per story |
| 24000 | +1 additional Sword |
| Bonus | type |
|---|---|
| +1 Opal |
Self-Explanatory |
| +% Mining Efficiency | additive to star sign, Void vial, Mining Cards |
| x Bucket Fill Rate | Multiplicative |
| x cooking speed | Multiplicative |
| +% EXP Gain for Villagers | additive |
| x Gaming Bits Gain | Multiplicative |
| +% Chance for Bravery Opals | Multiplicative |
| +% DMG for all Characters | additive |
| x Bell Ring & Ping Rate | Multiplicative |
| +% All Monument AFK Gain | Additive |
| x Bravery Bonuses Multi | Multiplicative |
Glowshroom Tunnels
The Glowshroom Tunnels are the second set of caverns in The Caverns.
The Bell
