I want a spy game. Realistic, but made in A way so the player isn't misunderstanding the double meanings and code words. In other words, I want a game that makes me feel like a spy, and I want it during the Cold War. Because that would be awesome!
Actually that does indeed exist with the name of Covert Action, not set in the Cold War, atleast I'm not sure, but is pretty much the closest we'll get to a super realistic spy game.
It's set in very early 90s/late 80s, possibly 1990; KGB (and Stasi) is still around and plotting, but they are generally not the main antagonist of the plots - though if you play through 50 RNG 'metaplots'/'campaigns' you WILL face off against a KGB Mastermind at one point, or one of the many other late-Cold War baddies like Baader-Meinhof Gang, South American cartels, or Black September, sometimes slightly renamed.
It is a really cool spy game that feels like a spy game, not a James Bond simulator action game - it's actually closer to a detective simulator of sorts than a pure action game. Which it also does, in the break-in sequences if you don't want to/can't be sneaky, but the meat of the game is figuring out and foiling a plot, and in the metagame, identifying and arresting the mastermind behind the plots in the current 'campaign'.
And to do that, you're far better off wiretapping, planting bugs, photographing documents, hacking computers, turning plotters into double agents, code-breaking and, if you hate yourself, tailing suspects.
It's also been released in 1990, so... it's kinda aged. It's also a Sid Meyer game, BTW.