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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.

221
A Family of Me!

Create your 8th character, who will never get the love and affection you gave your first few characters when making new characters was still special

Rare
6.30%last reported global rate
222
House Flipper

Defeat Baba Yaga in under 25 seconds after they spawn in the Birch Enclave

Rare
6.30%last reported global rate
223
Anvil Expansion Again

Craft the Anvil III expander. More things to craft, again, yay!

Rare
6.70%last reported global rate
224
Specializational!

Choose a subclass for two of your characters.

Rare
6.70%last reported global rate
225
Bad Doggy!

Defeat Amarok on Chaotic Difficulty. He's all bark and... well, all bite too honestly.

Rare
6.80%last reported global rate
226
Colosseum Contender

Get a score of 25,000 or more in the Dewdrop Colosseum.

Rare
6.80%last reported global rate
227
Big Frog Angry

Defeat Grandfrogger on his 1st Difficulty.

Rare
6.90%last reported global rate
228
Mythical Gamer

Your level has reached a point where people debate whether or not it is possible!

Rare
6.90%last reported global rate
229
Demon Demolisher

Defeat the big hourglass and the toilet paper guy!

Rare
7.00%last reported global rate
230
Peanut Pioneer

No public description is available.

Rare
7.10%last reported global rate
231
Guild Member

Contribute 500 GP to your guild, proving you aren't that kid in the school project who lets others do everything!

Rare
7.20%last reported global rate
232
Tree Top Dropout

Reach the top of the Giant Tree in Blunder Hills

Rare
7.30%last reported global rate
233
Bending over Backward to Help

Complete 75 Quests on a single character. Seriously these are just errands the NPC's didn't wanna do.

Rare
7.40%last reported global rate
234
Giga Decimation

Defeat all Giga Frogs before any respawn.

Rare
7.60%last reported global rate
235
Slimeicidal Endeavor

Defeat 25,000 slimes in total. This counts kills from all your characters!

Rare
7.70%last reported global rate
236
My First Trophy!

Equip any trophy. Well, almost any trophy, limited-time trophies don't count.

Rare
8.00%last reported global rate
237
Comatose Gamer

Claim 30,000 hours of AFK gains. That's like 2 years, but again it's really more like 2 months cuz you have so many peeps in ur squad.

Rare
8.70%last reported global rate
238
Legendary Gamer

Your level is so massive it needs three digits! Just 4 more and you'll have a phone number!

Rare
8.70%last reported global rate
239
Powdered Neutronium

Rank up the Explosive Combustion refinery chamber to rank 2.

Rare
9.00%last reported global rate
240
Snowy Wonderland

Reach world 3, the coolest world in the game!

Rare
9.30%last reported global rate