Survivalist has five skills:
- Fitness
- Firearms
- Farming
- Medicine
Survivalist: Invisible Strain has nine skills:
- Fitness
- Archery
- Firearms
- Stealth
- Farming
- Medicine
- Cooking
Each skill is leveled by undergoing actions related to the skill. Fitness can be increased by running. Firearms is raised by shooting enemies. Construction is raised by building. Farming skill is increased by farming corn. Medicine can be increased by healing wounds.
Each skill has a book associated with it. These books raise the skill of its holder by one level and can be stacked.