This game is just simply awesome. Dialogs are just hilarious, just try to ask every NPCs a thing, you won't regret it. There is a lot of sci-fi/fantasy references in all the game. The story is really funny too.
The solo mod is fun, if you wanna talk to every NPCs and try to follow the story but i prefer to warn you, if you try to play with friends, it's nearly impossible to stay alive. And that's the fun of the multi, you have the friendly fire so you can cast spells to push your friends on the ennemies, or in the gaps. But don't worry, they can use resurrection's spells on you ;)
The mechanics of the games are awesome too, you have 8 elements of magick and you can combine them into an infinite possibility of spells.
I highly recommend it, even if you can only play in solo.