Over at the Elitist Jerks forum the World of Warcraft Dungeon & Raid Lead Designer, Jeffrey "Tigole" Kaplan answer several questions about the new Achievement system which Blizzard recently announced for their upcoming Wrath of the Lich King expansion.
The challenging achievements in the Dungeons and Raids area aren't fully flushed out yet. They are coming. Because we're still tuning that content, it's hard to come up with what would be the "perfect" raid achievement. Examples from TBC would be, "Kill Moroes with the 4 adds still up", "Kill Hex Lord with his adds still alive", "Kill Blackheart in one charm or less" etc... The Dungeon and Raid achievements thus far are what I'd consider to be the "base layer" with the more interesting ones still being developed and implemented.
If the achievements to acquire Sulfuras, Atiesh or Thunderury aren't retroactive I wouldn't expect a mass of people to be getting them. Maybe you'll be able to acquire the achievement by equipping the item perhaps.
Atiesh and Thunderfury are retroactively awarded because those items are based on quests. Sulfuras is not retroactive because there isn't a quest for the final item. But if you have the item on your character (bank or in inventory), you'll still get credit.
Has anyone noticed there isnt an achievement for 40-man KT kill, which would indicate that the achievements are not retroactive.
Straight-up kill achievements are not retroactively awarded. I know what a bummer this is but we can't track that information efficiently.
Also, there is no more 40-person Kel'Thuzad in Lich King... only 10/25.
Tigole, good to see you posting in this community. One quick question about achievements, though, do the points they give do anything, or are they just there to show others "hey, I've done THIS much"?
Right now, they only give cosmetic rewards: titles, tabards, vanity pets etc.
There is the possibility that we will do some attunements based on this system as well or that we will add some minor benefits such as consumables but right now the thought is that achievements are recognition of your progression, not the means of progressing.