I'm still in game design/database design which in this game are very closely linked. My goal is to be able to play the full game by invoking SQL scripts, which I'll turn into apis, and then start the web UI.
As far as theme it's spy fiction with the usual scifi/occult features. You manage a spy agency on the world map and have agents and resources of various types. You use the agents and resources to develop investigations and collect evidence. All the players' agencies are in competition for limited resources and limited rewards for solving cases.
The investigations are strictly speaking puzzles. Any investigation for which you already know the solution can be done trivially.
My goal is to create a sort of information race metagame which makes the players practice real information security and spying. The perfect result would encourage information sharing within a small trusted group of players (big enough to tackle complex investigations) but discourage information sharing in public (if you leak all your investigation solutions to gamefaqs then every single player can now progress to your level and compete with you for the next level).
It's a cute idea but I don't know how much players will like it. It already exists on some level in EVE and I'm not sure opsec is that fun.