AC!D Place in the series

Although Acid is part of the Metal Gear series, it does not follow the same continuity as the Metal Gear Solid games released for the home consoles, but instead follows on from Metal Gear: Ghost Babel, another non-canonical entry into the Metal Gear series. The game features a new cast, but characters, weapons, items and game mechanics from previous games are depicted on the cards. There are three card packs available that cover each of the major Metal Gear games; Metal Gear Solid, Metal Gear Solid 2: Sons of Liberty and Metal Gear Solid 3: Snake Eater. A fourth set is also available featuring cards based on the classic Metal Gear titles and miscellaneous Kojima games