We warned you yesterday, so if you picked up a copy of Assassin's Creed: Revelations yesterday afternoon and it wasn't severely discounted, that's kinda on you, dawg. Anyway, Amazon is holding a one-day-only sale on everything Assassin's Creed, from the first game all the way through to Ezio's closing act. That means Revelations for $36 (40 percent off), Brotherhood for $20 (that's half off), and AC1 and 2 for $15 a pop (pop, pop).
The PC versions offer similar discounts, though the DS and PSP games aren't discounted at all. Then again, let's not kid ourselves, you're really just looking for the major releases, aren't you? That's okay, we are too.