Apollo Justice: Ace Attorney, released in Japan as Gyakuten Saiban 4 (逆転裁判 4, Gyakuten Saiban 4? lit. "Turnabout Trial 4"), is a visual novel video game for the Nintendo DS. It is the fourth video game in the Ace Attorney series.
Apollo Justice: Ace Attorney is the first game in the series to be developed specifically for the DS as opposed to being a port of a game originally for the Game Boy Advance. As such, many of the techniques utilizing the DS touch screen and microphone features that were employed in the fifth case created specifically for the DS port of the first Ace Attorney video game are a fundamental part of Apollo Justice. Additionally, the graphics are notably improved and polished compared the original Ace Attorney, while still remaining similar.
