There's no reason that playing games can't be a "productive" activity in terms of stimulating your imagination (like watching a movie or reading a book), or communicating/cooperating/competing with others (if it's an online game, for example). The idea that "computer games" = "unproductive/bad/lazy" is kind of old-fashioned I think.
That said, of course there are downsides if you spend all (or a disproportionate amount of) your time playing games instead of getting physical exercise, interacting with other people in real-life, building skills and knowledge, etc. etc.
Everything in moderation.