Talk:Christmas Achievements/@comment-83.208.144.179-20161130173522/@comment-30067635-20161130174331

Unique means that you don't have those locomotives in your museum, you can see them in the Museum under the "Uncollected" tab. So you can buy locomotives which you don't have in your museum, call express trains using whistles or unload express trains from your neighbours' stations maybe you will be lucky and find some unique.