IdleOn - The Incremental MMO / Achievements
01Mutant Massacrer
Defeat both mutant Minibosses: The Dilapidated Slush of World 3, and the Mutated Mush of World 4.
- Unlocked by
- 5.2%
- Rarity
- Rare
- Hidden achievement
- No
Data from Steam — Steam Web API Terms of Use. Last updated .