Sources
Mondiale is built on open data. The facts, maps and imagery in the game come from these sources — every figure in a round is traceable back to one of them.
International Monetary FundWorld Economic Outlook: macro-fiscal aggregates for its member economies, published twice a year.
World Economic Outlook (DataMapper API) — IMF terms — free for non-commercial use with attribution
Public finance
- politypolity
Every country's government, parliament and parties as structured data: chambers, seat counts, and which side of the house each party sits on.
polity (v1) — ODbL-1.0
Political parties
- CEPIICEPII
BACI: reconciled bilateral trade flows for 200 economies at the HS6 product level, from the French research center in international economics.
BACI: International Trade Database at the Product-Level (HS22, V202601) — Etalab Open Licence 2.0
Top commodity exporters
Our World in DataIndices and historical series on democracy, human development, health and lifestyle, environment and biodiversity, energy, tourism and the economy — aggregating V-Dem, Transparency International, UNDP, the WHO, the FAO, SIPRI, the IUCN, the World Bank, UNODC, UN agencies, NCD-RisC, the IEA and the Energy Institute.
Grapher datasets (full CSV downloads) — CC BY 4.0Marriage for same-sex partners (2026) — CC BY 4.0
Country profiles · Indices and long series · Same-sex marriage legalization
World Bank Open DataDevelopment indicators.
World Development Indicators (API v2) — CC BY 4.0
Country profiles · World Bank indicators
UN World Population ProspectsPopulation estimates and projections 1950–2100 from the UN Population Division: age structures, fertility, mortality and migration.
World Population Prospects (2024 revision) — CC BY 3.0 IGO
Country profiles · Demography and population pyramids
- UN Population Division
International Migrant Stock: where the world’s foreign-born live, counted by country of birth and country of residence.
International Migrant Stock (2024 revision) — CC BY 3.0 IGO
Where the foreign-born live
- UN Treaty Collection
The depositary’s own record for multilateral treaties: who signed, who ratified, and who never got round to it.
Multilateral Treaties Deposited with the Secretary-General — UN publication — free reproduction with attribution
Who signed what
Uppsala Conflict Data ProgramArmed-conflict data from Uppsala University.
UCDP/PRIO Armed Conflict Dataset (v25.1) — CC BY 4.0UCDP Georeferenced Event Dataset (v25.1) — CC BY 4.0
Country profiles · Armed conflicts · Conflict fields
OpenStreetMapThe world mapped by volunteers: every street, railway, river and park, down to the lane.
OpenStreetMap via Overpass (2026-08-25 extract) — ODbL-1.0
City street plans
Natural EarthPublic-domain map data: country shapes, seas, lakes and rivers.
Natural Earth 1:10m (v5.1.2) — Public domain
World map · Far-flung fragments · Seas, lakes, rivers and ranges · Disputed territories · Sea crossings · World of Change · Conflict fields
- GeoNamesGeoNames
Populated places with coordinates and local spellings, for the city rounds.
cities15000 dump — CC BY 4.0
City lights
WikidataStructured data on leaders, capitals, currencies and landmarks.
Wikidata items — CC0 1.0
Capital photography · National anthem recordings · Spoken-language recordings · Banknotes · Heads of state and government · Political parties · Landmarks & World Heritage Sites · Timeline events · Who signed what
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Wikimedia CommonsPhotography of leaders, capitals, banknotes, landmarks and flags, plus emblems of international organizations.
Wikimedia Commons media — Per file
Disputed territories · Capital photography · National anthem recordings · Banknotes · Heads of state and government · Political parties · Landmarks & World Heritage Sites · Timeline events · Empire extents
WikipediaSupplementary facts and figures.
Wikipedia articles — CC BY-SA 4.0
National anthem lyrics · Timeline events
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UnsplashSelected landmark photography.
Unsplash photography — Unsplash Licence
Landmarks & World Heritage Sites
historical-basemapsWorld country borders across five millennia of snapshots, for the empire extents.
World historical basemaps (@ 62d8f1a) — GPL-3.0
Empire extents
CShapes 2.0State borders and capitals 1886–2019, dated to the day — Schvitz et al. 2022, Journal of Conflict Resolution.
CShapes 2.0 (2.0 (1886–2019)) — CC BY-NC-SA 4.0
Empire extents
- flag-iconsflag-icons
The open-source flag set every country flag in the game is drawn from.
flag-icons (v7.5.0) — MIT
Country profiles · Country flags
- countries-listcountries-list
Currency codes and spoken languages per country.
countries-list (v3.3.0) — MIT
Country profiles
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Mozilla Common VoiceCrowd-sourced speech recordings in over a hundred languages, donated and validated by volunteers and released into the public domain.
Common Voice speech corpus (v17.0) — CC0 1.0
Spoken-language recordings
MondialeHand-maintained editorial data: land and sea adjacency, empire and landmark selections, legal milestones.
Hand-maintained game data — Compiled from public reporting
Country profiles · Top commodity exporters · Far-flung fragments · Disputed territories · Land borders · Sea crossings · City lights · Landmarks & World Heritage Sites · Timeline events · World of Change · Empire extents · Who signed what
NASA Earth ObservatoryMatched satellite pairs of one place decades apart, from the Landsat and Terra archives.
World of Change imagery — Public domain
World of Change
U.S. Geological SurveyFive decades of Landsat imagery, curated by the EROS Center into matched views of a changing planet.
Earthshots Landsat imagery — Public domain
World of Change