540 levels, five questions each

The All-in-One Challenge strings every kind of question on the site into one long climb: 540 levels of five questions, grouped into nine worlds of 60 named Explorer, Navigator, Cartographer, Geographer, Scholar, Professor, Master, Legend and Mythic. Each level you clear earns stars, and your progress is saved on this device and to your account if you are signed in. Hints are earned as you go and can be spent on any question.

How the questions change

The first levels ask only capitals, flags, continents and country-to-flag. New kinds unlock as you climb: emoji clues and country shapes at level 5, landmarks, bodies of water and lake shapes at 12, languages, currencies and neighbours at 22, city connections, partial flags and city maps at 35, satellite views, city silhouettes and geographic features at 50, country mysteries and banknotes at 70, and odd-one-out and showdown questions at 100. Once a kind is unlocked it stays in the mix, so by the Mythic world a level can draw on 23 kinds of question.

The countries behind the questions get harder with the worlds too, from the best-known countries in Explorer and Navigator to the obscure ones in Legend and Mythic. Every tenth level is a boss level built around one kind of question.