Well, GCHQ employees, the majority of whom are of course not spies per se. My pal used to go out with a fella who worked for GCHQ, and it mainly meant lots of agreeing to the house's occasional phone tapping, and having to sign lots of disclosure documents all the time. He said he worked in defense; we reckoned he was the janitor :-)
GCHQ's recruitment campaign will appear through a range of Xbox Live games, including blockbuster franchises such as Call Of Duty: Modern Warfare 2, Left 4 Dead 2 and Assassin's Creed II.
The government agency is running the six-week campaign using recruitment firm TMP Worldwide and said that many of its recruiting criteria are "reflected in game-play experiences on Xbox, such as quick thinking, problem solving and team work".
Xbox Live's main demographic, 18- to 34-year-olds, is also a good fit for GCHQ.
Might be a bit male-skewed if it's XBLA, I wonder where else they're advertising?
Also, the thought of the ad in L4D2 is really making me grin.