Yup. Main Character's life suddenly gets a hud that adds a layer that makes it be lived like playing a game.
Or, before said manhwa was released, die and find out their life was a game so they start from the beginning but now knowing the plot for at least that route and with access to the game tutorial and systems.
I'll admit, it is a bit of power fantasy, but it gets more interesting when the changes in actions, or in avatars, cause a change of route, or the game has a rubberband AI, or they end up in a higher difficulty. That adds a difficulty the character has to go through, and differences most other kinds of fics would need to make the character be OOC to justify but this kind doesn't because, despite the differences in the world, the character got the same initial mind as in the divergence point and will have to adapt to the differences together with the reader.