Mr. Do! 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.