Ongoing coverage of Russia's full-scale invasion of Ukraine

KYIV, Ukraine — "Quest" is a massive scavenger hunt that blends urban exploration with online cooperation and logic puzzles. Typically, players search vast areas for hidden codes that they then input into their smartphones. Finding a sufficient percentage of the codes hidden in each "level" unlocks the next location, sending the teams scrambling back to their cars. All-night season-finale games, like the ones shown here, begin in the early evening and finish the next morning, often traversing hundreds of kilometers in the process.