Serious Sam HD: The First Encounter / Achievements
01Serious Sam
Complete the game in single player on serious difficulty.
- Unlocked by
- 2.7%
- Rarity
- Very rare
- Hidden achievement
- No
Data from Steam — Steam Web API Terms of Use. Last updated .
Serious Sam HD: The First Encounter / Achievements
Complete the game in single player on serious difficulty.
Data from Steam — Steam Web API Terms of Use. Last updated .