I was pretty much jaw dropped and stunned when I was playing the xbox360 version of Damnation. The shooting style is horrible. You are performing weird acrobatic jumps up walls that just don't seem to fit with the game play. Luckily, I only rented that game, but I could not finish the story.

I suggest "worst" and "not-recommended" instead of "lemon." The term lemon is used for a lot of electronics to refer to something defective and totally non-functional -- as in, it won't boot up on your system, rather than it simply provides a bad playing experience.

(posted as an answer because I don't have enough rep to leave a comment or change tags)