Mastermind
Slayer achievement. Unlocked by 35.7% of players worldwide — common.
How to unlock
Defeat the Brain of Cthulhu, an enormous demon brain which haunts the creeping crimson.
Rarity
- Players unlocked
- 35.7%
- Rarity
- Common
- Category
- Slayer
Defeating bosses, mini-bosses and tough enemies. Unlock figures are the live global share of Steam players, refreshed daily.