Here is the full list of all 11 Take Thy Throne achievements.
Kill 50 Dragons
Take down 20 Towers
Slay 10 Kings at your own hand
Win 15 games of Take Thy Throne
Mine 80 Ores
Buy 70 Items from the store
Chop 80 Trees
Kill 100 Golems
Capture 20 flags in CTF
Kill 100 Players
Play during Halloween