It's a mix of both. Some parts will be based around the video game's story while others will be original things to add more to the characters.

Katherine was the daughter of the city's mayor. In both the remake and original she was killed by the police chief and was just a dead body you found.

Sorry I only know English

There's two main characters, Claire and Leon. The story switches off sometimes between the two to show a bit of both sides

Not really, the game has been my first and so far only knowledge of the apocalypse world. I might look into some of the other lore but for the most part I plan on keeping the story along the lines of what happened in the Earthblood game, but with my own twists and changes to try and improve the games story.