Full list of all 20 Harbor Master achievements worth 200 gamerscore. It takes around 25-30 hours to unlock all of the achievements on Windows Phone.
Score 500 on any map
Ship 50000 lifetime cargo units
Score 200 on any map
Shipped 10000 lifetime cargo units
Score over 50 on Cannon Beach without killing any pirates
Scared off 100 monsters
Sank 100 pirates
Scared off 50 monsters
Scored at least 100 points on Fast Forward
Sank 50 pirates
Scored at least 50 points on Fast Forward
Played a game of at least 50 points without any warnings
Scored over 50 on Monster Cove without killing any monsters
Scored 100 on any map
Had 10 boats on the screen at the same time
Scored at least 25 points on Fast Forward
Shipped 1000 lifetime cargo units
Played every level
Scored 25 on any map
Kept a boat on the screen for 3 minutes