I tend to shrug off nostalgia for franchises. Doom II was great and is one of my favorite shooter experiences of all time but that won't stop me from calling Doom III a complete piece of shit, which it was.
Metal Gear may have been one of the first stealth games (and a nearly impossible one at that) but since MGS, the franchise has wavered quite a bit while games like Thief and Splinter Cell offered superior gameplay (though without the sometimes endearing Kojima quirks).
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