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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.

141
Super Cereal

Have a stack of exactly 50,000 Sentient Cereal in your Storage Chest.

Very rare
3.00%last reported global rate
142
Ten Trips of Gold

Have a stack of exactly 30,000 Gold Ore in your Storage Chest.

Very rare
3.00%last reported global rate
143
20 Bundles of Jungle

Have a stack of exactly 20,000 Forest Fibers in your Storage Chest.

Very rare
3.10%last reported global rate
144
5-6 Pick up Sticks

Have a stack of exactly 20,000 Sticks in your Storage Chest.

Very rare
3.10%last reported global rate
145
Gold School

Have a stack of exactly 1500 Goldfish in your Storage Chest.

Very rare
3.10%last reported global rate
146
Platinum 200G

Have a stack of exactly 200,000 Platinum Ore in your Storage Chest.

Very rare
3.10%last reported global rate
147
Rat-a-tat-tat

Level up the 'FMJ' Alchemy bubble to Lv. 30

Very rare
3.10%last reported global rate
148
Sad Souls

Have a stack of exactly 1,000 Forest Souls in your Storage Chest.

Very rare
3.10%last reported global rate
149
Bonsai Bonanza

Harvest a total of 100 Bonsai-type Plants in Gaming.

Very rare
3.20%last reported global rate
150
Borrowed Pens

Remember all those pens you lent out in school and never got back? You've got 13 seconds to vent your anger on every penguin mob!

Very rare
3.20%last reported global rate
151
Cogs Be Waitin'

Have 16 unclaimed Grey Cogs at once. Jeez, I'm glad anthropomorphic cogs aren't real.

Very rare
3.20%last reported global rate
152
Croakin' Froge

Have a stack of exactly 250 Doge -I mean froge- critters in your Storage Chest.

Very rare
3.20%last reported global rate
153
Ink Blot

Use 101 silver pens in the Post Office

Very rare
3.20%last reported global rate
154
Petless

Trash 1000 pets. How could you be so heartless, so cold...

Very rare
3.20%last reported global rate
155
Rattle them Bones

Defeat every Bloodbone in just 12 seconds after entering the map. Wow, wild.

Very rare
3.20%last reported global rate
156
Shiny Shells

Have 6 bronze (or rarer) eggs in your nest at the same time, waiting to be hatched!

Very rare
3.20%last reported global rate
157
B-o-B to Help

Complete 75 unique quests on a single character. I'm not sure what B-o-B stands for either...

Very rare
3.30%last reported global rate
158
Cabbage Patch

Have 5 kitchens all cooking cabbages at the same time. Remember gamers, eat your vegetables, they ain't so bad!

Very rare
3.30%last reported global rate
159
Geared for Success

Have 40 Yellow Cogs placed on the board at once. Alright now I see how this is achievement worthy, cogs are kinda neat.

Very rare
3.30%last reported global rate
160
Great Plate

Upgrade a meal at the Dinner Menu to the point where it gets a purple plate!

Very rare
3.30%last reported global rate