About a year ago, I was part of a team that made a game in 48 hours, Spy Wear. It was for the Global Game Jam 2010. We won the Jammers' Choice award for our game, which was about Cold War spies trying to hide in plain sight while carrying on their agendas of building up dossiers of information or killing other spies.
It mixed a couple of different ideas . . . hiding in plain sight and trying to appear as if you were just another member of the populace, while at the same time trying to watch everyone else and determine who was and who wasn't a spy.
A few weeks ago I had a couple of conversations with my workmates . . . one was thinking of getting into Game Jam and the other was talking about board games (in particular, Power Grid). Something sparked in my head and I decided that the ruleset for Spy Wear might actually turn into a really interesting board game.
So far I've incorporated the idea of hiding in plain sight . . . which is a lot harder in a board game where everyone can see which pieces everyone else is using, but I think I've got something worked out that will do a slow reveal of a person over a series of turns . . . the rules aren't really locked down yet, so I can't really elaborate on it. I kept the game mechanics of needing to visit locations to build up information dossiers, and also being able to lay bombs as booby traps for other spies.
It's all still up in the air . . . but I'll put up some information once I've got a playable version.