Which are you playing on (Easy, Medium, or Hard)?
: You need both a high supply of coal and a steel mill to smelt gold ore. Build at least 3–4 gold mines to sustain decent output. Management & Survival Project Wunderwaffe
The layout of your underground complex determines your efficiency. Which are you playing on (Easy, Medium, or Hard)
: Invest early in mining and production research to ensure long-term stability. Which are you playing on (Easy