Thread:Deathstalker666/@comment-1915529-20140702204420/@comment-1496755-20141013190502

Heh heh, this sounds cool. And yeah - such changes and customisations are best done in single player mode. In a MMO, such effects woudl require a ton of phasing, which would ultimately restrict players' ability to interact with each other.

Take Warcraft's Alliance and Horde - in the older games, one side could gain complete dominance and annihilate the other (in a SP campaign) and conquer the world, but in WoW, none of the two can get any major victory against the other (cause it would be unfair to about half of the players).

Diablo 1 is another example - the best quests are only available in SP. Some of them can be found in MP as well, but as simplified versions (not nearly as fun).