Simple question, is Cyberpunk a sandbox game or not?
Depends what you expect out of a sandbox game. Some missions you can approach as you like, sort of like Assassins Creed style, others are completely linear, typical the main and side stories.
But besides these random missions, there is basically nothing else to do, so if you expect just running around doing all sorts of things, that is not possible.
I would probably categorize it as an open world adventure, action game, with some weak RPG elements.
Going into it, expecting a GTA style game with a serious amount of limitations, to the point where it's almost unfair towards GTA, to make such comparison
, but it have those wipes at least.
But it has some very cool delivered story, characters, lots of the missions are really a lot of fun and simply roaming NC is cool as well.
But in my opinion, to get the absolute most out of the game, one should approach it as a RPG game, where you as player involve yourself in the story of V and play by the "rule" so to speak and not thinking that it is a deep game with lots of RPG mechanics etc.
But again, it's actually difficult to tell, because the game is sort of all over the place, and only the story, characters and NC is exceptional good. Some of the other mechanics like shooting etc. are decent and fun. But if you just want to go in and shoot stuff, I would think that you could find better games out there.