I barely remember part of one dream that at least partly involved a video game.
I am not sure if the entire dream was a video game, or if only part of it was a video game.
Either way, some people who were in / playing the video game were using some quickly made video game mods made by the character Ainz Ooal Gown and / or some other characters from Nazarick (Great Tomb of Nazarick) from the anime television show Overlord.
The people were using these mods to help them survive in the video game.
Ainz Ooal Gown was overconfident, made the mods quickly, kept them short & limited, thought that no one would dare attack those using his / their mods, but at least one person who was using his mods started getting attacked.