Sort of half and half. I'd say most missions take place on the main map like in WoW. But often times those seem to lead to story missions where you enter
an instanced area.
Although they DO have more things to do then just "destroy this many". Some of the other things I've been asked to do is find a stolen passport.
Rescue citizens trapped under rubble (which you can pick up if you're strong enough, or just blast/hit the rubble till it breaks), help launch a hero with
metal skin through a rail gun... all kinds of things.
an instanced area.
Although they DO have more things to do then just "destroy this many". Some of the other things I've been asked to do is find a stolen passport.
Rescue citizens trapped under rubble (which you can pick up if you're strong enough, or just blast/hit the rubble till it breaks), help launch a hero with
metal skin through a rail gun... all kinds of things.