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