Here is the full list of all 29 Moontrain achievements.
Fix office communicator
Fix office communicator without using hints
Start the car engine
Start the car engine without using hints
Find a secret passage in the Theater
Help an owl to fell asleep
Light up the forest
Finish a driving minigame
Finish driving minigame without a crash
Enter the train door
Enter the train door without fail
Repair the dream machine
Defrost character
Pass all the rooms reached from the HUB
Fix a teleport
Defeat the gangsters
Defeat the gangsters without using windshield wiper
Find Sam Vigor
Collect art accessories
Collect art accessories without using Hint
Finish all mini shows without using Hint
Enter a train without using Hint
Finish the game without using Hint
Get to the other side of the bridge
Stun the duck
Make the crystal in the mold
Own 1 collectable
Own 10 collectables
Own all collectables