Vampire: the Masquerade
Which one is the 'Revised' Edition ? there is 1st ed, 2cd ed, Anniversary 2.0 edition, then the Vampire Requiem variants (aka New World of Darkness).
The anniversary version lacks many things found in the 1st 2 editions, like Merits and Flaws (you can find several good versions of these online) as well as free PDF downloads if you search around for older books.