First off, a gamer has to be passionate about the game and have a deep connection to it. Then, they need to be able to envision new scenarios and characters that fit within the game's framework. Good grammar and punctuation in the writing also make a big difference.
Well, a gamer needs to know the game's lore inside out. They should have a unique idea to stand out. And, good writing skills to bring the story to life are a must.
For a gamer, a good understanding of the game's world and characters is key. Also, creativity to add new twists and storylines is important.