Guide
Geo Blackjack makes city size risky
Every hit gives you city cards and a population total. Knowing which cities are huge, mid-sized, or safer small draws changes the odds.
Headcount is the map version
Headcount asks you to draw one loop around a target number of people. It trains population density, megaregions, sparse interiors, and coastal clustering.
Better than memorizing rankings
The games teach scale through decisions. Lagos, Chengdu, Lima, and Zurich are not just facts on a list; they become different kinds of risk.