Metal Gear Acid (rendered METAL GEAR AC!D; commonly abbreviated as MGA) is a video game developed by Konami Computer Entertainment Japan for the PlayStation Portable handheld game console. Although it is part of the Metal Gear series, it is not canonical and was first unveiled at E³ 2004 in May. It was released in Japan on December 16, 2004, and in North America on March 22, 2005.