A good spy game. Think of any spy movie. You have a team, you infiltrate facilities or parties unnoticed. We've had spy games, but I can't think of one where the team aspect is central. I'd like to be able to in some way control or at least give out orders for each member of the team. Pre-mission the player could decide who should take care of specific objectives, what equipment should be used, and what approach should be taken (on some scale of pure stealth/no kills to being able to cause pure mayhem) Of course, this means actually having good AI, but I can hope.