Having finished Dreamfall this afternoon, I have to rescind my recommendation for it. I do this for three reasons.
1 - If you haven't played the first game, you'll be lost. So many concepts are carried over, it's a bit mind-boggling.
2 - The lead character has an irritating Elizabeth Hurley 'Oh I'm so very, very British' voice that means they don't have any emotion and say every word ex-act-ly.
3 - Half the plot is missing, so you don't have a freakin' clue what's going on even if you did play the prequel.