Yes, we've all done it. Maybe played the demo and it seemed better then what the game actually was, or perhaps just an impulse buy for what the case graphic made it look like. But at the end of the day we all get the same feeling.... WHY THE HECK DID I BUY THIS CRAP!?
For me it would be Dirge of Cerberes... bought it just for the Final Fantasy collection, but sadly dissapointed with it. Everything about the game sucked; deffinately not what I expected.
In a close second is Enslaved for the ps3. Great game concept, but horrible story; completely filled with plot holes.
So what was your worst buy?