Looooooooooooong.
-Twilight Princess (found Clawshot in Lakebed Temple)
-Super Mario Galaxy (beaten Bowser but don't have 120 stars)
-Monster Hunter 3 (barely started)
-Metroid Prime Trilogy (about an hour into all of them)
-Okami (N. Ryoshima Coast, haven't met Dragons yet)
-Chrono Trigger (I forget)
-Final Fantasy 4 (Magnetic Cave)
-Knights in the Nightmare (Scene 5/29 is the furthest I've gotten)
-Phantom Hourglass (almost done, but lost steam just before final boss)
-Assassin's Creed 2 (Sequence 10, I think)
-Cave Story (Grasstown)
-Wings of Liberty (forget)
-I really should put more time into playing Minecraft, although it doesn't really have an 'end'
-Human Revolution (Highland Park facility)
-Amnesia: Dark Descent (barely started)
-Just Cause 2 (done about 7 faction missions)
-Half-Life 2 (Ravenholm)
-Batman Arkham Asylum (sneaking up on Harley Quinn to rescue Gordon)
-Super Meat Boy (Light World 6, about 50 Dark World levels finished)
-Knights of the Old Republic (barely started)
-S.T.A.L.K.E.R. Shadow of Chernobyl (barely started)
-Bioshock (started over some time back, furthest I've gotten is Prometheus)
-Deus Ex (Juan Lebedev's airfield with no augmentations and few skills leveled up)
-Fallout 3 (barely started)
-Max Payne (1-9)
-Max Payne 2 (1-2)
-Prince of Persia: The Sands of Time (about 30% or something)
-Sanctum (finished two maps on lowest difficulty)
-And I'm currently installing Psychonauts and Might and Magic: Clash of Heroes on Steam
-And I have Mario Kart 7 and Cave Story 3D on pre-order
-And I plan to pick up at least two out of Sonic Generations, Resident Wiivil 4, Xenoblade and Skyward Sword over pre-/post-Christmas sales.
This is exactly why my New Years' Resolution is "no new games in 2012 except Bioshock Infinite, which will probably be the only 2012 release I'd find interesting anyway".