Metal Gear Solid: Portable Ops Plus

Metal Gear Solid: Portable Ops, officially abbreviated MPO, is a 2006 action-adventure stealth game developed and published by Konami for the PlayStation Portable. The game was directed by Masahiro Yamamoto and written by Gakuto Mikumo, with series creator Hideo Kojima acting as producer. While not the first Metal Gear game for the PSP, unlike the previously released Metal Gear Acid and its sequel, as well as the Metal Gear Solid: Digital Graphic Novel, it retains the action-based play mechanics from the mainline series.