For the original poster: Can you please change the title of this into something like "Can't extract archive Shank 2 for Linux" so that more people can easier identify it? I think there will be a lot of comments here Soon... I hope a fix will also come Soon. I actually bought the Indie Bundle for this game only.
I had no problems unpacking the archive. But seems it's a more common issue than the missing file. I don't know why I didn't get an error. Will update the title.
@Nanthiel - You have the same problem as we do. Some GUI archiving tool may suppress the error, or just show something neutral message. I was also able to extract a lot of file, but at some point it just can't find / extract the rest of the files. This is when the error appears in the console and this is why you had no executable.