Tom Clancy's Splinter Cell: Blacklist

Unleash the force of the most lethal agent to ever exist. You are Sam Fisher, and you've been granted the ultimate license to protect innocents against an array of global terror attacks known as Blacklist - the freedom to use limitless power, to bend or break virtually every law, and to rise to the level of the world's most lethal operative. If you are successful, the President of the United States will deny your existence. If you fail, millions will likely face their deaths.