Ghost Recon

 Tom Clancy's Ghost Recon is also now available for free. In Ghost Recon, you and your team conduct extensive missions on foot, but you'll occasionally have assistance from troops in tanks, helicopters and close air support. In many cases, you'll be working with international military forces and NATO to fight against rising dictators and rebel groups. Be prepared to scope out the defences of an enemy, blow up bridges to stop an advance, raid rebel bases, and rescue an American pilot who gets shot down deep in enemy territory.
You will need an Ubi.com account and you must live in the U.S. to play the game.

http://www.gameborder.com/game/Ghost%20Recon%20Free%20Full%20Game/