Each round asks you to name a set of countries — for example the ten largest by area. Type as many correct answers as you can. Correct countries light up green on the map; hit Give Up to reveal what you missed.

Your score is the share of all answers you found across the game.

All questions leave out microstates — Vatican, Monaco, Nauru, Tuvalu and the like — so you're not stuck guessing obscure tiny countries. A few questions are about smallness itself (the smallest countries, sea-level-rise risk...); those keep them.