A collection of courtroom simulation games based around the characters of Phoenix Wright, Miles Edgeworth, and Apollo Justice. The games take place in a world where all criminal trials are slated to take no more than three days and the defendant is assumed guilty until proven innocent. Our heroes attempt to find true justice within the limits of the law, convicting the guilty and saving the innocent.
"Ace Attorney, known in Japan as Gyakuten Saiban (逆転裁判, lit. "Turnabout Trial"), is a series of adventure/visual novel games created by Shu Takumi and published by Capcom in which players assume the role of a defense attorney in a fictional courtroom setting, which is based on the Japanese legal system, to strive to find their clients "not guilty" using investigation, evidence, and cross-examination to prove their case."
Source: Wikipedia, "Ace_Attorney", available under the CC-BY-SA License.