Metal Gear Solid: Portable Ops (commonly abbreviated to MPO) is a stealth action game directed by Masahiro Yamamoto and produced by Noriaki Okamura and series creator Hideo Kojima. Portable Ops was developed by Kojima Productions and published by Konami in 2006 for the PlayStation Portable. It is the fourth Metal Gear title for the PSP and the first one to retain the series' action-based gameplay. It was also the first game to utilize graphic novel inspired cutscenes.