Why British and US spies are infiltrating online games
13 December 2013 Last updated at 15:21 GMT
US and British intelligence agencies are reported to have infiltrated online games played by millions of people.
The spies have been trying to identify terrorist threats by observing messaging and payment systems used in the games. And Microsoft is warning owners of its new Xbox One of an internet prank that could ruin their consoles.
BBC Click's Spencer Kelly looks at these and other tech news stories.