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Tell us, what IS a good Spy?
VALVES GAME IS TOO HARD FOR ME. BAWWWWWWWWWWWWWW
OP + anyone that agrees doesn't play spy right. It isn't meant to be a combat class. The point of the spy is not to get caught, and not have to end up fighting. All of the "spy vs. x" examples you've given are for direct combat; the spy isn't built for direct combat, so of course he is going to lose most of the time. Also, the revolver is more powerful than you'd expect, and the Ambassador is even better if you can use it right (http://www.youtube.com/watch?v=eX4qlnGjSs0). I have played spy a fair amount, and almost never die as long as I use dead ringer.
I love playing spy, I play offensivly but the only thing I dont like, are the pyros who spray fire on EVERYONE they run across, to check for spies, that is not skill it is just luck when they find a spy.