Puzzles are brainteasers of many varieties, including visual, math, and logic. BBC MindGames was a British magazine devoted to puzzles, brainteasers and articles concerning the mind. The crossword clues were earned based on brainteasers presented to each pair of players. Each team has to enter an old war time fortification bunker to solve three brainteasers. The company specializes in building toys, brainteasers, and multi-player games. Such images have found use in information privacy, time-lapses, marketing, and brainteasers.