Backup Twin: Justin to Shawn in Hatchet II. Invoked in Hatchet III as the actor who played the two, Parry Shen, came back to play Andrew, a paramedic who's not related to the two. There's even a You Look Familiar moment as one of the medics tells him that they found Shawn's corpse and that he looks like Andrew, resulting in a All Asians Look Alike moment.
Black Dude Dies First: Subverted. The Asian boat driver Shawn is the fourth one to bite it, while the black guy Marcus makes it to the final three. Also subverted in Hatchet II as Rev. Zombie is the last one to die and in Hatchet III where Deputy Winslow is third to last to die.
Bolivian Army Ending: Victor climbs into the boat, kills Ben, rips his arm off, then pulls Marybeth out of the water screaming. Cut to black, roll credits.
The sequel reveals that Marybeth escapes Victor.
Subverted at the end of Hatchet III with Andrew being the only non-wounded survivor while Marybeth... It's hard to tell if she'll live or not.
The Cameo: Tony Todd, at least for the first film. He has a much bigger part in II. Then there's also SidHaig in III as the last known living relative to Victor Crowley, who also has the ashes of Thomas Crowley.
Creator Cameo: Film's director Adam Green appears briefly in the Mardi Gras montage in the first film, and appears yet again, suffering from a hangover in II, then appears one last time in III getting brought into jail.
Comes back to bit Victor in the ass in the beginning of Hatchet III after he pushed onto the running chainsaw by Marybeth, slicing him in two vertical slices... Though, we know he gets better.
Classically Trained Extra: Jenna is an NYU graduate who is clearly upset that she's had to stoop to doing softcore porn. Only she was lying about being an NYU grad; she actually went to Hofstra University.
This joke becomes a lot funnier if you grew up in Long Island and know about the reputation that Hofstra has as a party school.
Played Straight and Averted at the same time in Hatchet III where Hawes tries to do the same and get in a fight with Victor, even having the spine to call him a Bitch... Only to get said spine, along with his skull, ripped out of his body.
Fanservice: The first appearance of Misty and Jenna has them topless and making out. We get a few more shots of their bare breasts before the end of the movie. And then there's the Mardi Gras montage at the beginning...
Turns into a Final Guy trope at the end of Hatchet III with Andrew being the only survivor while Marybeth is impaled on a tree branch, though she might live.
Flipping the Bird: Done by Marcus when asked to come down from the tree he just climbed up in terror.
Freudian Slip: When Shannon asks what kind of movie Doug is directing, Doug asks her and her husband Jim if they've ever heard of Bayou Beavers. Jim replies yes, then suddenly switches his answer to no.
Hoist by His Own Petard: In the original, Victor is (temporarily) killed when he runs into a pole he threw into Ben's foot, impaling himself through the neck. In the sequel, he discards his own hatchet and Marybeth uses it to demolish his face.
The same happens to Reverend Zombie, as he believed that the death of Marybeth's uncle would stop things, only to find out that her uncle had died a long time ago.
Also in the sequel, Victor used a huge ass chainsaw to slice Vernon and John vertically in two. In the intro of Hatchet III, he ends up falling onto the chainsaw and is split in two himself... Though, it doesn't kill him.
Hope Spot: Marybeth, Ben and Marcus set Victor on fire and think they've won... and then it starts raining.
Happens AGAIN in Hatchet III when Marybeth and Amanda try giving him the ashes of his dad, hopefully to end him for good... Then Deputy Windslow shoots him... Not a smart move.
Jerkass: Doug Shapiro, the sleazy porn director, who turns out to be a marketing manager named Samuel Barrett who posed as a porn director only to build his own porn collection. And he's fromNew Jersey.
Kill 'em All: In both films, everyone but Marybeth are dead.
Kill It with Fire: Marybeth, Ben and Marcus try this in the first film. It doesn't work.
Even Victor Crowley himself isn't immune to this, as running into a pole is sufficient enough to cause his impalement, and tiny little Marybeth is able to turn his face into pudding with a few hatchet hits.
Sequel Escalation: The sequel's reel at ComicCon showed eight deaths, almost as many as there were in the original movie. The director promptly revealed that they hadn't even seen half of all the deaths that they had planned.
Kane Hodder has gone as far as saying Hatchet 2 is the best horror film he's ever worked on.
Sliding Scale of Comedy and Horror: While the film is essentially a straight slasher flick, it has more comic relief than most, and its killings are so absurdly over-the-top it seems clear that the creators are being at least a bit tongue-in-cheek about the whole thing.
Done in universe when Sheriff Fowler dismisses Marybeth's claims of Victor Crowley, telling her that it all sounds like something from a stupid horror movie series. What really sells it is The Drunken Guy's, played always by Hatchet creator Adam Green reaction to hearing that.
There Is No Kill Like Overkill: A lot of the deaths involve this trope, but a notable example is at the very end of Hatchet II, Marybeth makes sure Victor is good and dead by hacking his face into pulp with his own hatchet, and then when he twitches, by shooting what's left of his head with a shotgun. Do you blame her, though?
Useless Protagonist: Andrew in Hatchet III does nothing except freak out and runs away and hides when he sees Crowley. Justified as... Well, wouldn't you be doing the same? He ends up surviving the movie.