Country data derived from https://github.com/mledoze/countries, ODbL 1.0. The complete original upstream snapshot is provided as countries-source.json. Derived countries.json remains under ODbL 1.0. See COUNTRIES-LICENSE.txt.
Map: World Atlas 2.0.2 / Natural Earth, public domain. https://github.com/topojson/world-atlas
D3 7.9.0 and TopoJSON Client 3.1.0: ISC, see vendor licence files.
Question rules, UI and game implementation independently written for The Dles. No competitor question bank or code is included.