Knack was touted as one of the PS4's biggest and best launch titles, but it turned out to be a linear and unimpressive Ratchet and Clank-esque snoozefest.
Its biggest problem might be that it can't decide what it wants to be. Is it a stealth game? A kids game? A hardcore game that only looks like a kids game? We have no idea, and we suspect its developers don't either.
When you try to make a game for everyone, you wind up with a game for no one. Unless you're Nintendo. Lesson learned?