
Levels
- Level 1: +25% maximum Stamina.
- Level 2: +50% maximum Stamina. Requires player level 5 with 2 points spent on this perk.
- Level 3: +75% maximum Stamina. Requires player level 10 with 4 points spent on this perk. Unlocked by finding or buying a manual.
- Level 4: +100% maximum Stamina. Requires player level 15 with 6 points spent on this perk. Unlocked by finding or buying a manual.