Released in 2007 for the PlayStation Portable, 'Metal Gear Solid: Portable Ops Plus' is an expanded edition of 'Metal Gear Solid: Portable Ops'. It is a stealth action game directed by Masahiro Yamamoto and produced by series creator Hideo Kojima. The game introduces new multiplayer modes, characters, and stages not seen in the original 'Portable Ops', and refines the gameplay mechanics and controls. It does not include the story mode from its predecessor, focusing instead on the expandability of the player's squad and replayability.