Tom Clancy's Splinter Cell Chaos Theory Windows game

It is the year 2003.
In response to the growing use of sophisticated digital encryption to conceal potential threats to the national security of the United States, the NSA (National Security Agency) has ushered forth a new dawn of intelligence-gathering techniques. This top-secret initiative is dubbed Third Echelon. Denied to exist by the U.S. government, Third Echelon deploys elite intelligence-gathering units consisting of a lone field operative supported by a remote team. Like a sliver of glass, a Splinter Cell is small, sharp, and nearly invisible.

March 10, 2004
The CIA contacted NSA officials regarding the loss of contact with Agent Alison Madison, a CIA operative monitoring widespread communication shortages plaguing the former Soviet Republic of Georgia.

A second operative, Agent Blaustein, was inserted into the Georgian capital T'bilisi to locate Agent Madison, only to drop from contact seven days later. Fearing for the lives of American agents compromised at the hands of a suspected terrorist effort, Third Echelon has activated operative Sam Fisher to locate the missing agents and evaluate the situation.

You are Sam Fisher
You must leave no trace on the physical or political map. Remember: Although killing may compromise secrecy, the choice between leaving a witness or a corpse is no choice at all. You are a Splinter Cell.