- Alternative Character Interpretation: As this review points out, the entire "adventure" in Castlevania could've taken place in Tim's mind.
- Fridge Brilliance: Dracula being subservient to a manifestation of Death makes some sense when you realize Death is usually the hardest boss in Castlevania games.
- Harsher in Hindsight: The Bionic Commando novelization has an instance of this. Early in the book, Jack has trouble working the bionic arm, but pulls through. When he gets through the area he speaks to the arm, telling it he'll take care of it, and it'll take care of him. Fast forward to the 2009 sequel, where Rad Spencer's arm is his wife, who vowed to always be by his side...
- Hilarious in Hindsight: The Castlevania II book has Dracula be a lackey of a Greater-Scope Villain named Thanatos, Master of Death. Later Castlevania games would have the heroes, as well as Dracula himself, face off against Satan on occasion, and Aria of Sorrow reveals the castle and all of Dracula's power stems from a single monster named Chaos.
- Narm: The main reason these books are remembered is for their copious amounts of narm.
It looked as though Count Dracula was going to win the battle.
"I will drink your spirit like cherry pop!" said the count, flapping his cape and showing his fangs. "Yes, Simon Belmont! You will become one of my children of the night!"
- The Scrappy: Timothy Bradley, the protagonist of the Castlevania II book, is one of the least-liked characters in the book series for his candy cravings, drawing attention away from Simon Belmont, being generally self-centered and cowardly depending on the danger, and making awful puns. He gets a little better later on in the book as he does more stuff to help, but not by much.
- So Bad, It's Good: They're comparable to Captain N: The Game Master in this regard, especially Mega Man 2, Metal Gear, and Castlevania II. Blaster Master and Bionic Commando are generally regarded as the best adaptations, with the former even becoming canon to the game series.
- They Wasted a Perfectly Good Plot: Some of the original material explored could have been interesting had more time and care been devoted to them.
- The Mega Man 2 book has Mega Man inexplicably become human, which leads to him feeling afraid of Air Man for all of half a page before the plotline is all but ignored.
- The Castlevania II book has Dracula's spirit fighting for control of Simon's body, which is accurate to the game's backstory to a degree, but it isn't delved into much as Timothy is able to drive Drac off with bad jokes. Simon also has to resist the Seven Deadly Sins to avoid Dracula's influence, which leads to a bout with gluttony and anger and not much else.
- Unintentionally Sympathetic: Worlds of Power's Dracula accidentally ends up relatable because he can't stomach Timothy Bradley's awful jokes.
- Unintentionally Unsympathetic: Tim Bradley was meant to be a relatable viewpoint character for the reader but ends up as a case of This Loser Is You who alternately tries to get out of helping Simon and doesn't realize the gravity of dangerous situations until they're spelled out for him. His chocolate obsession also makes him generally unlikable, even after he kicks the habit.