Darkle shows you a country from orbit at night, centred on one of its brightest cities. All you have to go on is the pattern of city lights, roads and coastlines glowing in the dark.
From NASA's Black Marble, a global map of the Earth's lights at night made from satellite data.
Yes. In hard mode you cannot zoom back in and neighbour tags are hidden. Hard-mode wins show a star in the shared result.
Yes. All four games are free to play in any web browser, with no account or download needed.
Each game has one new daily puzzle, and it unlocks at midnight in your own time zone. Everyone in the world gets the same country on the same day.
Yes. Every game has a practice mode with unlimited random rounds, and practice rounds earn XP towards levels.