Developer: Kojima Productions
Publisher: Konami
Genre: Action
Sub-Genre: Tactical Stealth Espionage
Release Date: Dec 5th, 2006
Additonal Info: Japan December R/D: 21, 2006...
Developer: Kojima Productions
Publisher: Konami
Genre: Action
Sub-Genre: Tactical Stealth Espionage
Release Date: Jun 12th, 2008
Additonal Info: None
Developer: Cellius Inc.
Publisher: Sony Computer Entertainment
Genre: Action
Sub-Genre: N/A
Release Date: N/A
Additonal Info:
Konami’s PlayStation Portable exclusive, Metal Gear Solid: Portable Ops Plus has gone gold and is on track for its intended release in North America on November 13.
An updated version of the original 2006 release, Portable Ops Plus includes a plethora of new content, including new multiplayer maps (such as a revamped version of the REX hanger from the Metal Gear Solid) as well as new playable characters, including Raiden (Metal Gear Solid 2: Sons of Liberty) and Old Snake (from the forthcoming Metal Gear Solid 4: Guns of the Patriots)
Furthermore, the single player campaign has received some overhauls, featuring a new Training Mode, Shooting Range and the all-new Infinity Mission, requiring players to progress through considerably more difficult mission parameters.
Stay tuned for more coverage on Metal Gear Solid: Portable Ops Plus in the coming months.
Source: onAXIS

Metal Gear Solod: Portable Ops Trailer
I'm not a big fan of metal gear.
Does this mean that MGS:PO+ is another one in the story or is it just a remake but with more features? Unless this is the game that bridges between MGS2 and MGS4, it sounds like a cash-cow title to me. MGS:PO was great already as it is, let's keep it that way.
Re: KingMario5 then dont post in MGS related stories.
I guess this is another "Sub" version like Substance or Subsistance. Definatly a cash cow, and unless it's mad cheap it's not goint to sell too well. 20 bucks at best is all I'd pay for it, because it's been ages since the first one came out and chances are most people have exhausted it's welcome.
Its basically just like MGS3: Subsistance, no new campign but I am big fan of Metal Gear, I will add this to my collection
So,that infinite war thing IS a seperate game?
psn id: gingo... i'm not a big fan of the psp version of metal gear but if it sells units then i'm happy