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