Capital Gains I

The player-level economy resource — earned each round (base income + interest + win/loss streaks), spent on rerolling the shop, buying XP, and purchasing units. Augments grant flat gold, raise interest, or make kills drop gold; some items generate gold on takedown.

Round-end gold earned per 10 gold banked, capped at 5 by default. Economy augments raise the cap (max interest) or grant flat bonus gold "in interest" beyond it.