Here is the full list of all 12 Quarrel achievements worth 200 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox 360.
You defeated all-comers in Showdown.
You made a staggering 100 Quarrel anagrams.
You dominated the Known Quarrel World and now wear the Quarrel Crown!
You captured a phenomenal 100 prisoners.
You completed all Challenges to Gold standard
You finished a match with a perfect Word IQ of 200.
You skilfully defeated Rex, Helena and Kali in a single timed match.
You efficiently claimed Calamari Cove from Dwayne, Caprice and Malik in a single turn.
You made a whale of a word worth at least 20 points.
You captured a prisoner from each player in a four-player match.
You capably captured Starfish Bay in Domination without losing a single quarrel.
You made your first ever Quarrel anagram.