I'm playing through Broken Sword: The Shadow of the Templars when I noticed half-way through it felt very similar to The Da Vinci Code. I had to look up the release dates of both.
Broken Sword: The Shadow of the Templars 1996 (started working on the story ten years prior)
The Da Vinci Code 2000
There was a section on the Broken Sword: The Shadow of the Templars Wikipedia article that addresses The Da Vinci Code connection:
"[Writer, Director, and Producer Charles] Cecil has said that the game's fanbase believes Dan Brown to have been influenced by Broken Sword when writing his novel, The Da Vinci Code, because of the parallels between the two works. Cecil stated that he is flattered by this sentiment, but that he would never claim so himself due to the threat of Brown's "very serious" lawyers. Joao Diniz Sanches of Pocket Gamer said Broken Sword's story is a "tale, some would argue, that effortlessly outclasses Dan Brown's similarly themed and tricksy novel." In an article about Broken Sword, Computer and Video Games described the Knights Templar legend as "great mythology to base a game on." They noted that Broken Sword "came out years before The Da Vinci Code made that sort of thing popular."
The writing and story in The Da Vinci Code are too similar to Shadow of the Templars to be a coincidence and don't believe for one second Dan Brown ever came up the idea on his own. I'm pretty confident Dan did a wholesale copy of the themes, settings, and even the characters. Take, for example, a French woman teaming up with an American to solve a murder mystery, her father's connection to a mysterious secret group, both of them discovering a cuneiform styled puzzle, a mysterious assassin, it takes places in France, and so forth. He appears to have engaged in the form of plagiarism ("to steal and pass off the ideas or words of another as one's own"). But as Charles noted he couldn't do anything about it because of "Brown's "very serious" lawyers." Man that just sucks. Brown rips off Cecil's hard work and becomes a billionaire in the process and a well-known author too boot.This comment was edited on Dec 3, 2019, 03:58.
"What is the most resilient parasite? Bacteria? A virus? An intestinal worm? An idea. Resilient... highly contagious. Once an idea has taken hold of the brain it is almost impossible to eradicate."