i was thinking something similar to daily achievements ?
i don't get that with the "Coin" ?
for now there are 52 Types each type (except some One-Time achievements like Noble,Leader,ClanLvL,Married and 2-3 more...) you can setup up to infinity leavel via XML only and SQL part its calculating in real time. Also some Achievement "Missing" from the video because it have "filter" like:
ACADEMY : Appears only if you have not done the second class transfer.
SPOIL : Appears only if you have spoil skill "ID : 254" else no reason to be there.
CLAN_LEVEL_UP : Appears only if you are l