Metal Gear Solid: Portable Ops, officially abbreviated MPO, is an action-adventure stealth video game directed by Masahiro Yamamoto and written by Gakuto Mikumo, with series creator Hideo Kojima acting as a producer. Portable Ops was developed by Kojima Productions and published by Konami in 2006 for the PlayStation Portable (PSP). Metal Gear Solid: Portable Ops Plus (officially abbreviated MPO+), the game's stand-alone expansion, focused primarily on online play and was released for the PSP in 2007 in Japan and the USA and in 2008 in other regions. In June 2016, both games were made compatible with the PlayStation Vita and PlayStation TV as downloadable titles via the PlayStation Store.
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