This is NOT an adventure game.
MMO's are generally fighting games in the sense, that you develope a character through quests, which involves killing stuff one way or the other...
However - this particular game does have an adventurish gene... investigation quests where you solve things.
Some you have to google to find clues - it has a built-in browser, so you don't have to leave the game.
It's actually very different from the "normal" MMO's in the way you progress you character.
It has a story questline where you are sent to different zones - BUT if you only do those, you're not helping yourself.
There's a myriad of other sidequest, which helps you better understand the world/story.
Sort of personal quests from all the NPC's (non player characters)
Ragnar has said, that what you see right now in the game, is NOT the whole story.
They have story patches lined up for the next half year/year already, which will be released cirka every month... so it's an ongoing story.
I like it very much