Feats of Strength achievements represent the player's various glories of Azeroth, and as such, they are very difficult — if not impossible — to earn. They are worth no points, and unlike normal achievements, unearned feats are not displayed in the achievements interface. Feats include obtaining raremounts, special titles, and more. Some Feats of Strength can still be obtained, while others are no longer possible to get. Deprecated achievements (ones that can't be obtained and have been made obsolete due to changes in the game) can be found in the Legacy tab.
A new category for deprecated achievements has been added, Legacy. Many Feats of Strength have been moved there. Realm First! achievements have not been added for leveling characters or professions in Warlords of Draenor.