The last game I finished (almost finished... too boring) was American McGee's Grimm.
I LOVE American McGee's Alice, one of my favorite games of all time, with a great atmosphere. I had great expectactions on this (now old) game, but it revealed itself as a simplistic and boring nothingness.
You play as Grimm, a... dwarf-like creature, who doesn't like fairy tales for their lighthearted tone. So he want to turn them dark and disgusting: you walk in levels that looks all the same with the same music over and over again, and the things you pass nearby become darker. It's nice to see everything transforming, but that's just it... nothing else to do, nothing interesting... pretty lame and boring game.