Splinter Cell: Double Agent brings back veteran agent Sam Fisher, for an enemy unlike any he's faced before. To stop a devastating attack, he must infiltrate a vicious terrorist group and destroy it from within. For the first time ever, experience the relentless tension and gut-wrenching dilemmas of life as a double agent. As you infiltrate a terrorist organization in its American headquarters, you must carefully weigh the consequences of your actions. Kill too many criminals and you'll blow your cover. Hesitate too long and millions will die. Do whatever it takes to complete your mission, but get out alive. New authentic gadgets, used by NSA government agents in addition to black-market terrorist weapons

Dual objectives to fulfill - NSA government agents and terrorists will each want you to accomplish opposing tasks at the same time