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Definitions, sources & country coverage
World Bank, World Development Indicators. Retrieved 2026-11-14. Each game uses the observation year with widest country coverage (latest year breaks a tie), then filters by continent. No different-year values are compared. Numerical ties switch the baseline. Missing/older values remain documented in the saved registry, not invented or silently substituted.
GDP · current US$ · 2025 · 181 playable countries. Total economic output, in nominal current US dollars. Source. Missing: North Korea, Vatican City.
Population · people · 2025 · 194 playable countries. Total resident population, using published estimates. Source. Missing: Vatican City.
Surface area · km² · 2024 · 192 playable countries. Total surface area, including inland water. FAO/World Bank definitions. Source. Missing: Vatican City.
GDP per person · current US$ per person · 2025 · 181 playable countries. Nominal GDP divided by population; not income or purchasing-power parity. Source. Missing: North Korea, Vatican City.
Life expectancy · years · 2024 · 194 playable countries. Life expectancy at birth, total population; a statistical period estimate. Source. Missing: Vatican City.
Urban population · % of population · 2025 · 194 playable countries. Share living in urban areas. National definitions of urban vary. Source. Missing: Vatican City.
Saved observations and provenance · CC BY 4.0 and additional terms. Country conventions do not imply universally agreed boundaries.