When I hear about a new game, I usually read the first sentence or two on Wikipedia. I rule out games described as certain genres or types, like soulslike or online-only multiplayer games. Then, I check reviews on a site like Metacritic. If the critic or user reviews (doesn’t need to be both) are good enough, I add it to a list to play.
I also do this with movies and tv. Obviously, with sequels/series I know a little bit more about the games/movies/shows but I still go in as blind as possible.
I do this for movies. If I see a teaser and like it, I don’t want to see anything else till release.
The ones that kill me these days are the TV show ones where at the end of episode one they feel the need to give you a trailer for what your about to see. Noooo just stop! Who wants that! Gotta rush to get the remote to turn it off…