The MMO Add-on for Goat Simulator has 16 achievements worth 640 gamerscore.
Visit all zones on the MMO level
It never erupts when you want it to.
Do a card trick at the magician
Unlock the gravity goat mutator
Find all the trophies on the MMO Level.
Unlock the wheel of time mutator
OMG IS THAT WHAT I THINK IT IS?
Trash the server room
Unlock the ExcaliGoat mutator
Baa with the choir
Get deviously trapped again
Enjoy your trip
Jörgen
Jump on the launchpad
Unlock the mermaid mutator
Do a lot of hurt. With your butt.