Talk:Christmas Achievements/@comment-83.97.181.8-20141219193726/@comment-15636815-20141220003725

There are so many reasons why this might have happened that it's impossible to answer your question without more information. Having said that, 100% of the reasons that I've observed or seen reported involved player error.

Instead of driving yourself crazy attempting to determine the problem, why not just send four more trains and complete the achievement? It's not like this is an emergency because the achievement is going to expire two hours from now; you have until 12 Jan.