Card Dude
Collect 120 unique cards. This basically makes you like, THE guy who does the card stuff!
Very rare4.60%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.
Obols Oh Boy!
Have 10 Silver Obols equipped at once. The Family tab counts here!
Very rare4.60%last reported global rate
Pillars of Sand
Defeat 250,000 Sandy Pots combined across all characters. Forget the Pillars of Salt though.
Very rare4.80%last reported global rate
Vial Noob
Get 3 vials to Lv. 4, which are the green ones
Very rare4.90%last reported global rate
Meel Time!
No public description is available.
Rare5.10%last reported global rate
Meet the Dev
No public description is available.
Rare5.10%last reported global rate
Yawning Cogs
Have 4 unclaimed Yellow Cogs during any single moment in time, apart from March 16, 2026 at 3.07pm
Rare5.10%last reported global rate
Big Frog Big Sad
Defeat Grandfrogger on his 3rd Difficulty.
Rare5.20%last reported global rate
Dumbo the Destroyer
Defeat Efaunt on Chaotic Difficulty. Watch out for his new kick attack, and for all his old attacks since they're still deadly!
Rare5.30%last reported global rate
Mutant Massacrer
Defeat both mutant Minibosses: The Dilapidated Slush of World 3, and the Mutated Mush of World 4.
Rare5.30%last reported global rate
Based Roots
Reach The Roots, which is the map below the Sticks monsters in the Giant Tree
Rare5.40%last reported global rate
Big Mobs, eek!
Defeat 5 Giant Monsters. You'll learn about these at the Prayer Rock in the Frostbite Tundra town.
Rare5.40%last reported global rate
Sweet Victory
Get a Score of 200,000 or more in the Sandstone Colosseum
Rare5.40%last reported global rate
Right to Bear Iron
Equip an Iron Helmet, Iron Chestplate, Iron Pants, and one Iron Tool.
Rare5.50%last reported global rate
Coarse Cards
Level up cards for Mafioso, Sandcastle, Pincermin, and Mashed Potato, all up to 1 star.
Rare5.70%last reported global rate
Crystal S-S-S-Suuuper Slam
Defeat 100 Crystal Monsters! This could go a couple rounds...
Rare5.80%last reported global rate
Dungeon Pinch
Deal 100 or more damage in a single hit in any party dungeon.
Rare5.90%last reported global rate
Milky Wayfarer
Reach World 4, the purple world with all the space stuff and things!
Rare6.10%last reported global rate
Big Frog Furious
Defeat Grandfrogger on his 2nd Difficulty.
Rare6.20%last reported global rate
2 Minute Meal
Spawn Grandfrogger within 2 minutes of entering the dungeon.
Rare6.30%last reported global rate