Serious Sam 3: BFE / Achievements
01Are You Serious!?
Complete the game in single player on unmodified serious difficulty.
- Unlocked by
- 3%
- Rarity
- Very rare
- Hidden achievement
- No
Data from Steam — Steam Web API Terms of Use. Last updated .
Serious Sam 3: BFE / Achievements
Complete the game in single player on unmodified serious difficulty.
Data from Steam — Steam Web API Terms of Use. Last updated .