5 rounds, same for everyone today. One shot. Build your streak.
Endless random rounds. Warm up, learn the eras, no pressure.
10 rounds spanning all of history — antiquity to today.
Inventions from one decade sit on the map. Read the tech, guess the decade.
We name an invention. Drop a pin where it was made and guess the year.
Endless rounds — guess the decade from the tech on the map.