Released in 2007, Hatchet is the whole slasher package: there's a genuinely creepy (and mysterious) killer, an unexpected setting, and a whole lot of twisted kills. The movie kicks off when two college students decide that Mardi Gras isn't exciting enough for them for some reason, and they decide to take a boat tour in the bayou at night with a bunch of strangers. Soon their guide starts filling them in on the swamp's legendary serial killer, and things go downhill for the students from there.
Where to watch: Amazon Prime