sentences:  Under Nakamura's leadership, Namco would produce several successful games throughout the 1980s, including "Galaga" (1981), "Ms. Pac-Man" (1982), "Dig Dug" (1982), "Pole Position" (1982), "Xevious" (1983) and "The Tower of Druaga" (1984).Unlike rival companies, notably Nintendo, Nakamura tested each of Namco's video games before they were released, sometimes for up to 23 hours at a time.Nakamura is considered to have been one of the first to identify the potential of "screen addiction" due to how much younger people would play "Pac-Man" and his company's other games.