Monsters Love Candy new has one discontinued achievement. The "Sweet Tooth" achievement. The store no longer has boost purchases available so it is no longer possible to get this achievement. If you have not unlocked the "Rainbow Eyes" achievement, I recommend getting it as soon as possible because if more of the store is taken down this achievement will also become discontinued.
Nothing official has been announced yet, however, Steam achievements have been sort of released for Dawn of War 2. I can't find any information on anything official so I don't know when it is going to move to Steamworks but when it does it will likely render all of the online achievements for the game discontinued.