Pesky adventurers are invading your underworld home! It up to you to build a puzzle dungeon, find the Secret Pieces and change the story so the Bosses are triumphant! For anyone who grew up playing 80s and 90s video games, this 1000-piece mystery puzzle is the perfect gift: Pixel art gives the puzzle a unique look that's packed with retro details! A puzzle with a twist: the box cover isn't the final image. A tip booklet gives you clues to find the Secret Pieces that change the story! Based on the best-selling card game, Boss Monster. When you done, open your envelope to finish the story and claim your prize! Finished puzzle is 20 x 28 inches.