Flagzio is a free online flag quiz with 250+ country flags. Challenge friends to real-time multiplayer flag duels, race the clock in Speed Rush, push your luck in Blitz, or chase the longest Streak. Play by region — Europe, Asia, Africa, Americas, Oceania — or take on the special US state flags, historical flags and ideology flags packs. Climb the global leaderboards across every mode. No download, no install, just open Flagzio and play in your browser.