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After a cursory look at the Video Game folder, the writeups for Pokémon Sword and Shield and Cyberpunk 2077, which contain lies about the development processes of the game, come to mind.
There's definitely a difference between lying about the plot and lying about other things. Lying about the plot is not exactly a plot trope, since it's external to the work, but it's related since it affects the audience's experience.
Lying about other things, on the other hand, is just plain lying. And, unfortunately, probably PSOC.
Unfortunately, especially in the gaming world, there's a tendency to shoehorn in complaining about the creators and publishers not living up to audience expectations. I guess "the publisher is lying about the game" ranks up among "the developers are lazy" and "the publisher is greedy" as top complaints. But that's not what this trope is about.
Edited by GnomeTitan

Is Lying Creator supposed to refer only to cases where the creators lie about the plot in order to protect plot twists? The page itself has many examples of creators "lying" about other things. I kind of feel like stretching it beyond twist-hiding lies might make it too complain-baity and subjective.