The term refers to supplementary components designed to extend the gameplay of the Rush Hour puzzle game. These add-ons typically include a set of new challenge cards, presenting players with novel traffic gridlock scenarios to solve. For example, an enthusiast might purchase a set that introduces ‘expert’ level challenges, increasing the difficulty and complexity of the original game.
These supplemental materials enhance the replayability and longevity of the core game. They provide continued mental stimulation and problem-solving practice for players who have mastered the original set of challenges. Historically, such additions have been a common strategy in the toy and game industry to maintain consumer interest and offer ongoing value for the initial investment.