At last, I found a way to fix the previously broken achievements - "FOE Forever Ending" and "Lost and Confused Ending." I apologize to those who had frustrations with that in the past. If you should have gotten the achievement previously, try updating the game, then just Start a new game from the main menu. If you still have local save data on your computer, the game should refresh all your achievements to your account.
Secondly, be on the lookout for the soundtrack, which will be available here in the store as a DLC circa March 17th!
And finally, if you enjoyed Quantum Conscience, please check out my new game "Serafina's Crown," which will release on Steam on March 15th!