Teenage Mutant Ninja Turtles, released in Japan as TMNT: Super Kame Ninja and in Europe as Teenage Mutant Hero Turtles, is a 1989 beat 'em up arcade game released by Konami. It is based on the Teenage Mutant Ninja Turtles franchise, including the first animated series that began airing two years earlier. In the game, up to four players control the titular Ninja Turtles, fighting through various levels to defeat the turtles' enemies, including the Shredder, Krang and the Foot Clan. Released during a high point in popularity for the Teenage Mutant Ninja Turtles franchise, the arcade game was a worldwide hit, becoming the highest-grossing dedicated arcade game of 1990 in the United States and Konami's highest-grossing arcade game. Versions for various home systems soon followed, including the Nintendo Entertainment System. A sequel, Teenage Mutant Ninja Turtles: Turtles in Time, was released in 1991.

A beat 'em up is a video game genre featuring hand-to-hand combat against a large number of opponents. Traditional beat 'em ups take place in scrolling, two-dimensional (2D) levels, while a number of modern games feature more open three-dimensional (3D) environments with yet larger numbers of enemies. The gameplay tends to follow arcade genre conventions, such as being simple to learn but difficult to master, and the combat system tends to be more highly developed than other side-scrolling action games. Two-player cooperative gameplay and multiple player characters are also hallmarks of the genre. Most of these games take place in urban settings and feature crime-fighting and revenge-based plots, though some games may employ historical, science fiction or fantasy themes.