What's the worst video game you've ever played?

Sonic 06. This is coming from someone who eagerly wanted to be optimistic about the game, especially given how, on paper, it seemed very reminiscent of the Adventure games. I purchased an Xbox 360 and the game to try it out, to see if it really was as bad as people say it is.

It was...very sloppy. There are glitches everywhere, to the point where a significant amount of deaths will occur due to them, such as wall running physics just randomly breaking, causing you to fall into pits of lava, having to hit the jump button 10 times just so Knuckles jumps off of a wall every time, and even when not considering the glitches, the controls just feel awkward and clunky, Sonic himself is slow and the physics leave a lot to be desired. I enjoyed the story much more than what the gameplay had to offer.