Another hurdle we had to overcome was how to store and merge our data. World of Warcraft has multiple updates or patches in development at any one time, each in a different stage of development. If an art asset or terrain file is added to one patch, the system is designed so that it also automatically shows up in later patches. This meant that If we had simply inserted a new patch for WoW Classic into the current development environment, we would have overwritten things like the current broken dam in Loch Modan with the previous intact version—and as you can imagine, this would have caused issues for Battle for Azeroth.


This past BlizzCon, Blizzard announced thatWoW Classic would be coming out in the Summer of 2019. Along with it came a demo of the early leveling zones and several panels worth of information that assured the eager public that Classic would indeed be as faithful and ‘blizzlike’ as possible. Having played through the entire demo I can agree that the game is almost exactly as I remember Vanilla being 14 years ago. The only difference in design being the implementation of ‘sharding’, a process which splits up the player base in different instances of the same zone to alleviate some of the overcrowding in early zones. Blizzard has also gone on the record to say that sharding would only be in the game for the first couple weeks after the launch of Classic and that they would then disable it once the player base had spread out more. However, sharding isn’t the only thing thatVanilla players might find different about their experience. In this article, I am going to go through each of the aspects that will most likely change inClassic WoW, whether Blizzard likes it or not.
In OSRS, before bonds (their equivalent of tokens) were released, there was a strong gold industry, but most people who bought gold did so by buying bonds on the main game, then finding a dedicated 'swapper' who'd exchange their RS3 gold for an appropriate amount of OSRS gold (taking a cut for themselves, of course). I wonder if a similar system will pop up in classic wow
Some class systems from the original game simply don’t have a modern equivalent. The class probably most affected by this is the hunter. The pet happiness and loyalty systems were removed a long time ago, as well as pet training and the ability to use both a ranged weapon and a melee weapon. In these cases, converting the old data to the new system wouldn’t work, simply because there is no new system to match. In this instance, we had to bring back the old code—and we did. Fortunately, the restoration went smoothly, though the reality of having to buy arrows or feed their pets again took a few people in our internal tests by surprise.
So even though you can play a WoW Classic demo today, we’re not done quite yet. We have lots of capital city features to look at, such as banks and auction houses. We need to test our dungeons and raids to make sure the bosses’ abilities all still work correctly. We need to examine all of our PvP systems. But we’re committed to taking a close look at all of these and more as continue bring the classic game back to life.
Nov 15 Which class are you planning on rolling? I'm still trying to decide between: Orc shaman: enhancement until 60 then resto for pvp Undead priest: shadow unless I decide to raid a bit Leaning towards these healers since I don't mind the role and 5 mans will be insanely easy to pickup. I've also been tossing around the idea of rogue/mage since that is what I played back on during vanilla/BC (had a blast ganking).Xano24 Nov 15
As it had been executed in Vanilla, Can Blizz launch the PvP rank system? As somebody who was wow classic gold around back then, and without needing to get overly hand-wringy, I feel that the position system itself supported some fairly unhealthy behaviors. That top rank took months of continuous grinding, and I mean constant, 10 to 12 hours each day, to the stage where people weren’t even functioning properly and everything out of that honor grind was excluded. There were things in WoW Classic that you had to forfeit your wellbeing and life outside of WoW Classic to obtain.

Rogue combo points posed another challenge, because the game’s modern resource system knows how to gain and spend combo points, but not how to lose them when changing targets. There are also the older combat formulas to consider, so we had to bring back the code for the prior combat formulas including critical hits and crushing blows. Their chance to occur is also modified by the difference between the defender’s defense and the attacker’s weapon skill. Yes—weapon skill is back. We had the data for this aspect of the classic game, but we also needed to restore the code that increased your skills when you used them and made your skill level affect your chance to hit or get a glancing blow.
Even though the guide was developed with a hunter, the guide can be followed by any class.  Except you have to do your class's quests which aren't a whole lot.  I do have full intention to make my guide friendly with all classes in the future by listing all of their steps as well.  There will be a toggle that allows you to show which class's steps you want to see in the guide.  But this is coming later.

After this past year of working on this project and forging our way through the various bugs and challenges, one consistent theme that’s emerged is that the difference between what we have and what we want is clearly visible. When we look at today’s World of Warcraft, we can see the differences between the modern game and the classic one. If we tried to update the reference client, we would have instead been tracking down a lot of “invisible” changes such as exploits waiting to be abused, crashes that don’t show up until you have millions of players online at once, and more. We chose to approach the problem in a way that makes our job clear and obvious instead of difficult and hard to see. 
Even though the guide was developed with a hunter, the guide can be followed by any class.  Except you have to do your class's quests which aren't a whole lot.  I do have full intention to make my guide friendly with all classes in the future by listing all of their steps as well.  There will be a toggle that allows you to show which class's steps you want to see in the guide.  But this is coming later.
All the work we’re doing will ultimately allow us to recreate an authentic classic experience on a platform that is much more optimized and stable, helping us avoid latency and stability issues. Additional improvements will include modern anti-cheat/botting detection, customer service and Battle.net integration, and similar conveniences that do not affect the core gameplay experience.
PHASED CONTENT ROLLOUT – Following its launch, World of Warcraft Classic’s content will be released over the course of multiple phases reflecting the game’s original order. Re-experience WoW history unfolding as heroes gear up for Blackwing Lair; players battle for PvP Honor and Rank rewards; and entire realms band together to open the gates of Ahn’Qiraj.
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