SOCOM: U.S. Navy SEALs Combined Assault
Combined Assault is a classic SOCOM game, it has it's highs, and definitely has its lows.
The singleplayer section of the game is just as entertaining as the rest of the Socom franchise games, it has an in-depth story and an array of weapons and objectives that will keep you occupied whether you play it through on admiral or ensign.
The Combined Assault multiplayer is really why people buy this game; it is yet another xbox-live challenging game with an excellent online lobby service.
However, this is essentially just a add-on for Socom 3, because you can play people who are playing Socom 3 online, and not much has changed in terms of gameplay or graphics.
Even so, it is still worth playing and getting addicted to, as there are cool things that you don't get in Socom 3, such as medikit's, armor, shotgun attachments for the M4A1.
The good points include a great online community and addictive, progressive gameplay;
The bad points include frequent lag, occasional cheaters, and camping bastards.