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Megabonk Achievements

Official Steam achievement definitions and latest reported global unlock rates, ordered from rarest to most common.

Total achievements139
Rarest rate0.900%
Ultra rare2
Last checkedOct 17, 2026
Delayed official data

Rates and award counts were last observed on Oct 17, 2026.

1
Cheesy Hat

As Amog, defeat a Tier 3 final boss with 8 Moldy Cheese and 1 Snek in your inventory

Ultra rare
0.900%last reported global rate
2
Crown

Get a gold star on every character (Rank 100)

Ultra rare
0.900%last reported global rate
3
Head Pot

As Roberto, obtain 4x Pot (stainless steel) in a single run

Very rare
1.00%last reported global rate
4
Iron Helm

As Sir Oofie, defeat the final boss of Forest 3 using Sword, Hero Sword, Corrupted Sword and Scythe

Very rare
1.20%last reported global rate
5
Magic hat

As Fox, get Firestaff, Lightning Staff & Blood Magic to level 40

Very rare
1.20%last reported global rate
6
Pilot Helm

As Birdo, kill 1000 enemies using Mines while flying in the air

Very rare
1.20%last reported global rate
7
Shady Hat (gold)

Buy 50 items from a Legendary Shady Guy

Very rare
1.20%last reported global rate
8
Clown

As Athena, kill 500 enemies using Quin's Mask

Very rare
1.30%last reported global rate
9
Sunglasses

As Calcium, finish the final boss fight on Graveyard in under 60 seconds

Very rare
1.30%last reported global rate
10
Challenges4

Complete 30 Challenges

Very rare
1.60%last reported global rate
11
Headset

As Ninja, complete Desert Stage 1 with at least 2 Boss Curse shrines activated

Very rare
1.60%last reported global rate
12
Shady Hat (pink)

Buy 60 items from an Epic Shady Guy

Very rare
2.00%last reported global rate
13
Challenges3

Complete 20 Challenges

Very rare
2.10%last reported global rate
14
Kevin Hat

Get punched by Kevin 100,000 times

Very rare
2.40%last reported global rate
15
Looooong Top Hat

Get 300,000 kills on Forest in a single run

Very rare
2.40%last reported global rate
16
Pumpkin

As Roberto, break every pumpkin on Graveyard

Very rare
2.40%last reported global rate
17
Microwave

Blow up 50 microwaves

Very rare
2.90%last reported global rate
18
Shady Hat (blue)

Buy 80 items from a Rare Shady Guy

Very rare
3.30%last reported global rate
19
Wizard's Hat

As Vlad, use Pot (stainless steel) to upgrade any weapon above its max level of 40

Very rare
3.30%last reported global rate
20
Sheriff's Hat

As CL4NK, kill any boss or miniboss in under 1 second

Very rare
3.50%last reported global rate