10 More Horror Movies So Sad You Can Only Watch Them Once

10. Train To Busan

It's admittedly pretty rare for zombie films to fully engage all the emotions, and to take one look at South Korean horror Train to Busan, you probably wouldn't assume it to be one of the most wrenchingly sad entries into the genre ever made.

Much as the film is packed with gory action, it's fundamentally about a father, Seok-woo (Gong Yoo), trying to protect his estranged daughter, Su-an (Kim Su-an), in the midst of an undead apocalypse.

It might sound like standard fare for the genre, but Train to Busan is a film that creeps up on viewers emotionally.

Seok-woo isn't exactly the most likeable of protagonists to begin with, and it's only over the course of the movie, while stepping up and acting as protector to his daughter, that he wins the audience over.

That it takes a zombie outbreak for Seok-woo to become the father he needed to be is a depressing revelation in itself, but the climax is very likely to leave you wiping floods of tears away.

Given that we as horror fans have something of a collective fatigue with zombie fare, it's uncommon for any modern entries to induce such feelings.

But at the same time, because this isn't a strictly "fun" zombie movie, you might not be compelled to revisit it much, if at all.