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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.

61
Monocle No More

Defeat 160 Sand Giants within 10 minutes of entering the map. Auto must be off.

Very rare
1.70%last reported global rate
62
Smirky Souls

Have a stack of exactly 250,000 Rooted Souls in your Storage Chest.

Very rare
1.70%last reported global rate
63
Smokin' Stars

Complete all constellations in the Smolderin' Plateau. You can check your progress within the Telescope.

Very rare
1.70%last reported global rate
64
This, is, Summoning!

Survive for 5 minutes in The King's Gambit. Find this feature in Cavern 14 of the Hole in world 5.

Very rare
1.70%last reported global rate
65
Fruit Salad

Have a stack of exactly 1,000,000 Fruit Flies in your Storage Chest.

Very rare
1.80%last reported global rate
66
Legendary Wormhole

On your Elemental Sorcerer, get a Wormhole Score of 83 or more on Niagrilled Falls. This is the number above your Wormhole!

Very rare
1.80%last reported global rate
67
Sqeakin' Mousey

Have a stack of exactly 60,000 Mouseys in your Storage Chest. Imagine the noise in that chest of yours... or even the smell, ugh.

Very rare
1.80%last reported global rate
68
Stars Among Stars

Complete all constellations in the Hyperion Nebula. Thats what world 4 is called btw.

Very rare
1.80%last reported global rate
69
W6 is Donezo

Get a Lava Skull or higher on every Spirited Valley monster in the Deathnote.

Very rare
1.80%last reported global rate
70
Bottle Capital

Have a stack of exactly 800,000 Bottle Caps in your Storage Chest.

Very rare
1.90%last reported global rate
71
Decked Out in Gold

Equip Golden Helmet, Chestplate, Pants, Shoes, two Golden tools, and the Defenders Dignity ring.

Very rare
1.90%last reported global rate
72
Good Times Roll

Beat wave 50 in Glublin Gorefest using ONLY Boulder Roller wizards. No freeze, no confetti, just boulder.

Very rare
1.90%last reported global rate
73
Regalis My Beloved

Get a Regalis Summoning Familiar.

Very rare
1.90%last reported global rate
74
Science Graduate

Find 70 unique crops, as shown by the Crop Scientist!

Very rare
1.90%last reported global rate
75
Spike Minigame Master

If u love me let me go... erm, I mean get a score of 13 in the Spike Minigame

Very rare
1.90%last reported global rate
76
Steppin' on the Rats

Defeat 500 Rats with at least 1 other party member

Very rare
1.90%last reported global rate
77
Straw Hat Stacking

No public description is available.

Very rare
1.90%last reported global rate
78
Tomb Completionist

Defeat Snakenhotep on his 3rd Difficulty.

Very rare
1.90%last reported global rate
79
Utter DISRESPECT

No public description is available.

Very rare
1.90%last reported global rate
80
Nuget Nightmare

Kill Crabbycakes manually, without Auto on, until one drops a Nuget Cake. Good luck...

Very rare
2.00%last reported global rate