DeletedUser
Guest
The tribe level 15 was already claimed, pPage 1, near the bottom by sparesourmilk, it appears they didn't put it on the Page, lvl 20 is nextHello,
I am claiming the Alpha Tribe level 15 achievement for White Walkers
Screenshot:
https://gyazo.com/38ff8ccda53f9d5d8ee99e73e0051e81