Eras Overview

GTNA organizes its progression into thematic eras:

1. Primitive Steam Era (ULV/Steam) - Bronze Age
2. Steam and Steel Era (LV/MV) - Industrial Revolution
3. Hydraulic Era (HV) - Hydraulic Power
4. Transition Era (EV) - Electrical Dawn
5. Supercritical Steam Era (IV) - Beyond Limits
6. Elemental Era (LuV+) - Elemental Mastery

Each era introduces new materials, machines, and mechanics that build upon the previous one.