Nautilus on 23 April 2016
Both.
Its hard to compare both, because not only they are from different genres, but each popularized each genre almost by itself.Not only that, while Minecraft sales numbers are highers, WOW has managed to have millions of active subscribers for more than 1 decade.So both are successful equally in my opinion
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.
https://gamrconnect.vgchartz.com/thread.php?id=241866&page=1
