Not a necessary play if you already played Portable Ops. Simply the same scenario without a story, just missions:/

User Rating: 6.5 | Metal Gear Solid: Portable Ops Plus PSP
It would be an excellent game if it wasn't for the fact that already a game with all the same scenarios and a story existed. You should play it if you enjoyed Metal Gear Solid Portable Ops, but don't make it a priority. You'll find this game an excellent experience if it's the first one you play.
If you haven't played the first game, then i believe you'll enjoy it more, but if you don't know which one to buy, don't even hesitate. Buy the first one.
Nevertheless, a few adjustments have been made relatively to the first game. It's faster do drag soldiers and easier to grab and choke adversaries.
Good gameplay, relatively good scenarios and also an interesting variety of weapons. Gives you the opportunity to use characters like old Snake and Raven. Doesn't take much time to beat the game though.