The chapter title "Hatred of Thieves" refers to Nate's warning in 400 Days that if Russell steals from him he will "get [his] throat out." Similarly, "Walk Among Cobras" is a reference to the music playing in his truck.
Nate's nicknames for other characters are reminiscent of the "affectionate" names he calls Russell.
The exchange between Nate and Charlie after she killed Hanna and Guatier is somewhat similar to the excahnge Nate has with Russell if Russell chooses to stay with Nate after he killed the elderly couple.
When Nate first tries whiskey, his reaction is to cough and splutter, similar to Russell's reaction if you choose to drink it. The difference being that Nate perseveres and enjoys the buzz, whereas the initial kick is enough to put Russell off entirely.
Vaughan touches Nate's face to force him to meet his gaze in Chapter 4 in much the same way Nate does to Russell later, although Vaughan is far more gentle about it.
Pushing the dumpster in Chapter 4 is arguably reminiscent of pushing Nate's truck for cover in 400 Days, complete with mashing prompts.
Dark and Troubled Past: A flashback sequence in Chapter 4 provides glimpses into Nate's childhood. Vaughan also mentions caring for his terminally ill mother before moving to America. And Jude mentions that he suffered from depression before the apocalypse began.
Heterosexual Life-Partners: Subverted. In the original version, "heterosexual life partners" Nate and Vaughan turn out to be in love, although Nate isn't brave enough to confess. In the revamped version, the trope is averted completely.
STD Immunity: Zigzagged in both the original and the revamp. In both, it's never stated that Charlie caught anything from the bandit she slept with, even though said bandit was a rapist. And in the revamp the trio never passes anything to each other. But in both versions, there are people who have AIDS.
Toilet Humor: Nate and Charlie make several crude jokes over the course of the story, especially when referring to Dr Nāgá.
Bystander Syndrome: Most of the crowd members do nothing to help the situation, choosing to watch and judge Nate, Charlie and Vaughan instead of helping out. That is, until they decide that Vaughan needs to die.
Blatant Lies: Hilariously so in the original version. "He's 'doing' me."
Conveniently Empty Building: Subverted. The only person in the house when the car crashed through it was upstairs and therefore wasn't in harm's way. However, Everyone that was in the backyard went into the house to see what happened, which lead to them getting attacked by zombies.
Every Car Is a Pinto: Averted. The car that crashes into the house never explodes, and the characters never once mention the possibility of it exploding.
Liquid Courage: The reason why Vaughan and Nate were drinking in the first place, so they can confront an angry Charlie and deal with Vaughan's cancer.
Police Are Useless: Various characters wait for the police to arrive but they never show up. Justified, as they're probably busy with a thousand other zombie cases or dead.
Zombie Advocate: Downplayed in the revamp. People in the crowd seem realize that the zombies aren't human, but still want Nate and Charlie to tie a zombie up instead of killing it in order for the police to question it.
This might seem a bit odd, since Nate tells his mom in a flashback that he can't understand her when she's speaking French, but it's implied that Nate is young at the time. So he would've had the time to understand it better as he got older, even if he couldn't speak it himself.
She Is Not My Girlfriend: Nate says this to Raymond after he mistakes Charlie to be his girlfriend, but soon tells him that they use to date each other.
Suddenly Bilingual: In the original, Nate being able to understand Sissy when she speaks French comes across as this. This is somewhat justified, since later on in it's revealed that his mom was French too, but there was no build up to this before the flashback.
Tragic Keepsake: It's revealed that Nate never got rid of the baby supplies he took. He doesn't have them after chapter 4 due to the doctors taking the majority of the supplies.
Aborted Declaration of Love: Nate doesn't say anything to Vaughan after the latter said that he loved him and Charlie, even thought he wanted to.
Downer Ending: Charlie is killed, and soon after, Vaughan succumbs to his cancer and is torn apart by zombies, leaving Nate to realize how much he loved them while sobbing.
Bait and Switch: Since Eddie talks about shooting "a guy" in 400 Days, the implication is that Vaughan will be the one shot on Day 41. Instead, the androgynous Charlie is shot, and Vaughan is eaten alive.
Heroic BSOD: The trauma of losing them causes Nate to blank out for months, as shown in the epilogue.
Evil All Along: Turns out the doctors were just using sick people to find a cure for the zombie virus.
Failure-to-Save Murder: Nate is accused by Raymond of killing them because he choose to leave the clinic with Charlie and a very sick Vaughan instead of saving him, Jude, and the other kidnapped patients.
Grey and Gray Morality: Kidnapping people and injecting them with a virus is clearly not okay. But the doctors aren't doing this just to be terrible. They're trying to find a cure and save humanity. The other survivors are not in the wrong for wanting to save their friends and family. But ultimately they're doing nothing to try and make the world a better place.
The Needs of the Many: A rather dark version. This is the mentality the doctors have for kidnapping and killing random people. It's in order to find a cure and save humanity, even if a few people have to die for it.
Overcome Their Differences: Most notably when Nate, Charlie and Vaughan are joined by Ritika, who wants to help them and the others to escape from Dr Nāgá's hospital.
Sadistic Choice: Nate had to choose between saving the patients and the captured allies and risk himself and his friends dying, or leaving them to die to save himself, Vaughan, and Charlie. Nate chooses the latter.
Suddenly Sexuality: In the original, finding out that Nate has feelings for Vaughan seems to come out of the blue. Aside from a few threesome comments he made previously, there was no real build up to it. This will definitely be averted in the revamp.
Vomit Indiscretion Shot: Downplayed. It doesn't go into much detail, but it does say that Nate had to move out of the way when Vaughan throws up after seeing Charlie get shot in the head.
What Happened To Mommy: Averted, since Dr. Phanin shoots Sissy's reanimated mother and Nate doesn't go back to the abandoned campsite to tell Sissy what happened.