Ghost Recon 2: Summit Strike is a great game by itself and is also a good expansion.

User Rating: 8.2 | Tom Clancy's Ghost Recon 2: Summit Strike XBOX
Ghost Recon 2: Summit Strike is the stand-alone expansion to Ghost Recon 2 which was a squad-based shooter from Ubisoft. This game adds 11 new single player missions and has a total of 24 multiplayer maps. The single player experience is fun and presents a challenge. Like I said, 11 new missions have been added. Ubisoft has improved the A.I. and also has added ragdoll physics so if you shoot an enemy that's on top of a hill, he will most likely roll all the way down. So this game is well worth the $30 if you want to play by yourself. The multiplayer portion resembles the first, but with a new gamemode "Helo hunt" where you hunt down enemy helicopters and shoot them from the sky, if you aren't familiar with the ghost recon series there are tons of gamemodes for all types of players. It also includes a total of 24 multiplayer maps with some fan favorites returning from ghost recon 2. So again this game is worth the $30 if you want to play multiplayer. Gameplay- The controls are pretty tight, and the action is fun. Graphics- Huge, detailed environments and lifelike characters. Framerate dips a bit in action with lots of characters on screen. Sound- Guns sound realistic and voice acting is good. The soundtrack is also very good. Value- With 2 difficulties for singleplayer and addictive multiplayer, this game is hard to put down. I love Ghost Recon 2: Summit Strike and know you will too if you pick it up. Weather you want to play by yourself, with a friend, or online, this game is for you.