Solution: Prepuzzle: Where's Waldo?
Answer: WENT BACK TO THREE SCENES

Written by Jonathan

This is the first puzzle that is unlocked during the hunt, and is required before progressing to the normal round. From the theme and name of the puzzle, we can expect that the Where's Waldo? series is relevant to this puzzle. In particular, we notice that the blanks in the puzzle match the names of the scenes in the very first Where's Waldo? book.

  1. In Town
  2. On the Beach
  3. Ski Slopes
  4. Camp Site
  5. The Railway Station
  6. Airport
  7. Sports Stadium
  8. Museum
  9. At Sea
  10. Safari Park
  11. Department Store
  12. Fairground

Once this is identified, simply extracting the indicated letters in the given order gives the answer, WENT BACK TO THREE SCENES.