is a 1982 maze game developed by Universal. It is the first arcade video game to be released as a conversion kit for other arcade machines; Taito published the conversion kit in Japan. The game was inspired by Namco's Dig Dug released earlier in 1982. Mr. Do! was a commercial success in Japan and North America, selling 30,000 arcade units in the US, and it was followed by several arcade sequels. Gameplay The object of Mr. Do! is to score as many points as possible by digging tunnels through the ground and collecting cherries. The title character, Mr. Do (a circus clown—except for the original Japanese version of the game, in which he is a snowman), is constantly chased by red dinosaur-like monsters called creeps, and the player loses a life if Mr. Do is caught by one. The game ends when the last life is lost. Cherries are distributed throughout the level in groups of eight, and collecting all the cherries in one group without a pause awards bonus points. A level is complete either when all cherries are removed, all creeps are destroyed, "EXTRA" is spelled, or a diamond is found. Mr. Do can defeat creeps by hitting them with his bouncing "power ball" or by dropping large apples on them. While the power ball is bouncing toward a creep, Mr. Do is defenseless. If the ball bounces into an area where there are no creeps to hit (such as behind a fallen apple), Mr. Do cannot use it again until he has retrieved it. When the power ball hits a creep, it then reforms in Mr. Do's hands after a delay that increases with each use. Mr. Do or the creeps can push an apple off the edge of a vertical tunnel and crush one or more creeps. If an apple falls more than its own height, it breaks and disappears. Mr. Do can also be crushed by a falling apple, causing a loss of life. Occasionally, the creeps transform briefly into more powerful multicolored monsters that can tunnel through the ground. If one of these digs through a cherry, it leaves fewer cherries for Mr. Do to collect. When it digs under an apple, it often crushes itself, other creeps, and/or Mr. Do. As the game progresses, a display at the top of the screen cycles through the letters in the word EXTRA. Every time the