the cliffhanger annoyed me in that too
I don't mind small cliffhangers, and I can (just) tolerate the infamous Dreamfall cliffhanger because as Tournquist points out, the game did resolve the Faith storyline at least, but when it ends in a "yeah we just decided to end it here even though it offers zero closure, guess you got to cough up for the sequel in a couple of years" it gets irritating. especially in Runaway 2's case where so much of the game felt like filler anyway