All six Scream movies. Was intending to watch the last one on Halloween but got delayed.
I'd seen the first three back in the day (1996-2000), was a nice trip down memory lane. So they did number four in 2011, then have started a semi-new-series thing with new ones last year and this year, and another on the way once strikes are over.
As overly long horror movie series go, they do seem to at least be making the effort to try and keep them half decent. The meta thing is more of a cliché these days, but Scream does have a valid claim to be doing it since the beginning. They're slowly running out of original cast, but I do like the new people from the latest two, so I'll probably keep watching assuming they're in the next. I don't much like Gail Weathers' face nowadays, but it's not nearly as scary as her vegan fringe (bangs) in Scream 3.
So yeah this was a fun binge for spoopy season, and the classics hold up well. Recommended if you enjoy the stabby stabby.