The opening for this game would feel quite weird if you hadn't completed the previous two games, right?
RIGHT?!
Coincidentally, and having nothing to do with the previous questions, I have no idea what's going on in Syberia 3.
HOWEVER, I think it's a huge step up in looks, puzzles, and dialogue. I'm not crazy with the movement controls, but otherwise I think it's far easier to invest in the feel and ambiance. I always felt it was a cool little adventure world that Sokal built, so it's important to dive in.
I think the whole Syberia experience works as a singular, on-going story. How have they not made some massive collection yet?