Of games I have not played to completion, it's Prison Break: The Conspiracy. Did you know there was a Prison Break videogame? Neither did I, until my housemate bought it for me as a joke. We played maybe twenty minutes and laughed a lot at how weird and awkward the graphics and combat were.

Of games I have played to completion? I don't want to say it's objectively the worst, because I think I'm followed by at least one person who likes it, and, given my dire taste, I know how frustrating it is when people go 'this thing you like is obviously terrible'! But I really didn't like Beyond: Two Souls. I found it largely dull, except when it was presenting rosy depictions of suicide that made me actively angry. Also, the protagonist and the ghost that's haunting her never get to kiss, which is a waste of the concept, frankly.