Gold is a run currency
Gold drops from enemies and chests. It pays for shops, refills and the rerolls that change your gear.
Unlike cells, gold does not survive death. Spend it within the run or lose it.
What shops sell
A shop sells weapons, ammunition, grenades and food. Some offer a reroll that refreshes the wares on the shelves.
Prices climb as the run goes on. Early gold buys more than the same gold spent late.
Buy for the build
Buy gear that matches your stat and fills a gap. A weapon you cannot scale is a waste of gold.
Food and flask refills matter more than an extra weapon when your health is low.
Save for the hard stretch
Hold some gold for the biome before a boss. That is where a refill or a better shield pays off.
Next: Gear quality and recycling and Health and flask management.