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Though I know Meridian was actually the 1st if I remember right (or was it The Realm Online?), and MUDs before that.
"If I offended you, you needed it" -Corey Taylor
SWTOR / BLUR hands down... ESO was pretty good too.Edit: since somebody already posted the swtor one
I'm not an IT Specialist, Game Developer, or Clairvoyant in real life, but like others on here, I play one on the internet.
Call of Duty has had some good trailers over the years. I think this one is my favorite...
@frostymug already linked it, but since it was under "also..." here it is again - this time as two videos in one: