Dreamfall Chapters has some nice 3d art, decent music and voice-overs, but as a complete game it's just not worth the time and money you're going to spend on it. The storyline is chaotic, constantly references the first two parts of the series and just doesn't stand on its own. It doesn't truly resolve and becomes completely incoherent in the last chapter. It doesn't seem to have any solid overarching ideas. It doesn't properly develop any of the characters. Moreover, the decision to add "choices and consequences" into the mix only exacerbates all of the above mentioned problems without providing any value. The game would be significantly better off if it was completely linear. Either developers were overly ambitious and run out of time and money, or they were just riding the Kickstarter boom and milking gamers' nostalgia for The Longest Journey. Considering how long Chapters was in development and how much it cost, I would bet on the latter. I could add more negatives, complaining about simplistic "puzzles" and numerous issues with location design, but what's the point? It's the overall experience that really matters here, and the experience is nothing like what it was in the magnificent original. If you haven't already, definitely play The Longest Journey and stop there. It will feel farm more satisfying and complete without the sequels.
You run in a linear fashion, you shoot stuff, you activate switches to run further and shoot more stuff. Weapons, ammunition and other items just lay around in the usual FPS manner. It's not as bad as, say, Quake 2. There are outdoor areas, friendly alien characters and neutral animals. Occasionally level designer give you some surprise, like collapsing bridge, or a vent that blows you away, but overall levels are quire synthetic. They are designed purely so you can run through them, shooting anything in your way. It's impossible to imagine those creatures actually living there. There are some text messages you can read, like diaries or logs, but I haven't seen much in terms of storyline. Overall, it's a standard and rather repetitive FPS with standards FPS design problems.