Heres the quote:
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I'd like to see a game mode where each player is given a secret enemy (or two), and you can only score kill-points by attacking that enemy. If you've ever played a "Missions" game of the boardgame Risk, you know what I'm talking about. It would be fun to try to find out who is trying to kill you, and also to subtly put bombers and nukes over your secret enemy's territory without them realizing you're trying to kill them.
Anyway, the reason why i ressurected the zombie thread was that i seriously think this is an awesome idea, and if i put it up here the devs might put it in the next update. Imagine how tense this would make diplomacy matches! Imagine building up an allies trust just to nuke him into oblivion when he finds out you were lying about who your target was.....