SAW IV
I'm a huge fan of the SAW franchise, and I thought after "III" they had a perfect trilogy on their hands, but money talks, so here we are with another addition to the series, and while it's not as good as what came before it, it's not as bad as it might have been either. Jigsaw is truly dead, but even from beyond the grave (no, he doesn't come back as a zombie or ghost or anything like that) he still manages to f*ck with people in really twisted ways. We get further insight into what made him become Jigsaw, the usual end-game plot twists (I guessed one, not the other, for what it's worth), a few more pieces of the overall puzzle are put together, and of course, the deliciously diabolical traps, which are as gruesome as ever.
Word to the wise, however: do not even attempt to watching this without having seen the others, particularly Saw III. At this point, the Saw movies are like a graphically-violent grand guignol soap opera, interlinked and layered, each new movie adding texture to the one that came before it.