While SOCOM 2 does have a solid single player campaign the bread and butter of the game resides in its multi player content.
The campaign of SOCOM 2 is pretty much your generic team based tactical shooter. You lead a team of Navy Seals on various missions such as extracting an informant trapped behind enemy lines. The missions are pretty bland and not all to fun. If you are looking for a good single player game you might want to look somewhere else.
Now the multilayer is the reason to buy and play this game. At the time this was one of the only games to support Sonys network adapter. Online games are set for 8v8 matches seals against terrorist with several different objectives such as, demolition, suppression, and extraction. Each side has there own unique weapons and play styles. The multiplayer on Socom 2 is very deep and addicting. And even now 5 years after its release there are enough people on the servers to make it easy to find a good match.
SOCOM 2 is a quality shooter that is often overshadowed by games like Halo and Call of Duty. But it is defenatly worth a play.