Here is the full list of all 10 MageQuit achievements.
Have 4 of your own worms on the battlefield at one time.
Hit the same enemy with all 7 Tears.
Get 5 kills in a single round.
Draft a full set of spells from a single element.
Complete the MageQuit tutorial.
Complete a couch game with at least 8 players.
Unlock a full elemental outfit set.
Hit the same enemy with 4 Scorches within 4 seconds.
Reach 20 kills in a 9 round game.
End a free-for-all match in a tie and win the showdown.