Metal Gear Solid: Portable Ops (Japanese: メタルギアソリッド ポータブルオプス, Hepburn: Metaru Gia Soriddo: Pōtaburu Opusu), 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).