The Sci-Fi Pack Add-on for Tracks - The Train Set Game has 5 achievements worth 500 gamerscore.
Achievements they've won
Achievements they've not won
Put an alien passenger in the basket of a flying bicycle
Take an alien passenger from a crashed UFO to a station
Recreate the moon landing shot and use the camera to take a photo
Put 50 unique decorations on the moon
Get 10 seconds of air time on the Moon