Here is the full list of all 27 Railbound achievements worth 1,000 gamerscore. It takes around 2-3 hours to unlock all of the achievements on Xbox One.
Found and completed the hidden level
Completed all bonus levels in World 6
Completed all bonus levels in World 10
Completed all base levels in World 10
Completed all bonus levels in World 9
Completed all base levels in World 9
Completed all bonus levels in World 8
Solved 3 levels without placing all available rails
Completed all base levels in World 8
Completed all bonus levels in World 7
Connected the trolley to the locomotive
Completed all base levels in World 7
Completed all base levels in World 6
Completed all bonus levels in World 5
Solved 2 levels without placing all available rails
Completed all bonus levels in World 4
Solved a level without placing all available rails
Completed all bonus levels in World 3
Completed all bonus levels in World 2
Completed all bonus levels in World 1
Completed all base levels in World 5
Completed all base levels in World 4
Made 2 cars crash in the middle of a tunnel
Completed all base levels in World 3
Completed all base levels in World 2
Connected at least 3 cars in the wrong order
Completed all base levels in World 1