Details agriculture, trade, and the daily grind of the pre-industrial world.
Essentially, if your campaign does not feature reliable firearms or electricity, GURPS 4e Low Tech is your bible. gurps 4e low tech pdf
To get the most out of the Low-Tech system, GMs often use the "Low-Tech Companions," which dive deeper into specific niches: Details agriculture, trade, and the daily grind of
You don’t need them to use the core PDF, but together they form the most complete pre-industrial RPG toolkit ever written. GMs often use the "Low-Tech Companions
: Offers mechanics for agriculture, trade, and the standard of living in historical settings [19].