Xbox support pointed me to MS chat or phone support, which isn't going to solve anything because the issue is with the game and not MS. The game developers facebook told me to email their support and that was 3 days ago with nothing but the auto response from Daedalic.
I would recommend everyone to post on their forums:
http://forum.daedalic.de/viewtopic.php?f=222&t=6141I have left my 2 cents/rant, but I think it would be helpful for them to understand the community they are ignoring so please add your comments as well.
But their responses are less they favorable so far in that they consider broken achievements very far down their list of issues.
"I will not comment on the issue further after this post, so...
We are aware that the achievements aren't working for some people and we are sorry for that.
But our resources for bugfixing are rather limited and are very much focused on exactly this: fixing bugs, especially gamebreaking ones.
So if the majority of our players can play our games from Beginning to End, we have achieved our goal. Fixing Steam Achievements is on that list for bugfixing, but it's pretty far down the line as we do not consider these "gamebreaking" (they don't prevent you from enjoying our games)."