Yellow Belt
Find a +50 Yellow Belt Sneaking Charm. Yes, exactly +50.
Very rare1.00%last reported global rate
Steam
IdleOn - The Incremental MMO Achievements
Official Steam achievement definitions and latest reported global unlock rates, ordered from rarest to most common.
Total achievements276
Rarest rate0.300%
Ultra rare16
Last checkedSep 17, 2026
Delayed official data
Rates and award counts were last observed on Sep 17, 2026.
Knock on Wood
Beat wave 50 of Acorn Assault with just 4 towers active. Place down a 5th tower at any time, and it wont count!
Very rare1.10%last reported global rate
Leet Lanterns
No public description is available.
Very rare1.10%last reported global rate
Minecart Master
Get a score of 103+ in the Mining Minigame, beating the Developer's score!
Very rare1.10%last reported global rate
Two-Time Savior
Equip the Blunder Hero Trophy, while also having another in your inventory.
Very rare1.10%last reported global rate
Just Passing By
Pass 30 rooms in Snakenhotep's Dungeon by doing the thingy the room says to do.
Very rare1.20%last reported global rate
Legendary Flag
On your Siege Breaker, get a Flag Score of 150 or more on Erruption River. This is the number above your Flag!
Very rare1.20%last reported global rate
That's MY Crown
Have a stack of exactly 100,000,000 Royal Headpiece in your Storage Chest.
Very rare1.20%last reported global rate
WAAAAAAAHH!
No public description is available.
Very rare1.20%last reported global rate
Wurm Wumbo
Have a stack of exactly 100,000,000 Mongo Worm Slices in your Storage Chest.
Very rare1.20%last reported global rate
Cob Enjoyer
Have 1,000,000 or more Corn crops in your Depot at once. Mmmm, Corn!
Very rare1.30%last reported global rate
Sepia Vision
Have a stack of exactly 500 Black Lenses in your Storage Chest. Better complete this before I make it 1,000!
Very rare1.30%last reported global rate
Spectre Stars
Complete all constellations in the Spirited Valley. You can check your progress within the Telescope.
Very rare1.30%last reported global rate
The True Emperor
Reach a total of 1 million Wormhole Kills.
Very rare1.30%last reported global rate
Beanstacker Prodigy
Add 14 different golden foods to The Beanstalk.
Very rare1.40%last reported global rate
Choppin' to the Beat
Get a score of 141+ in the Choppin' Minigame, beating the Developer's score!
Very rare1.40%last reported global rate
Crop Flooding
No public description is available.
Very rare1.40%last reported global rate
Effervess Enthusiess
Have a stack of exactly 5,000,000 Effervescent Logs in your Storage Chest.
Very rare1.40%last reported global rate
Unreal Overgrowth
Get an overgrowth of 8,192x on a single crop.
Very rare1.40%last reported global rate
Big Big Hampter
No public description is available.
Very rare1.50%last reported global rate