When writing a story for a game What do I leave for developers for example do I write about levels of the game or do I leave that for the designer. What exactly does game writers take care of as far as the settings and the story

my 2 cents...

I think it really depends on the team, the kind of game, the budget and your position in the company

a creative director can decide a lot of stuff, but others writers are just hired to fill the gaps between action sequences with a crappy plot...

For me, the first thing is maybe a basic idea : what kind of Universe and what kind of gameplay (open world, fps, rpg elements...) are we creating. And then the design team must become the center of the development, because gameplay will/should drive narration : cut-scenes ? narration in game ? choices ? exploration ? how can you use interactivity to tell the story (through environment, through dialogues, directly within the gameplay etc). You need to thin about it and discuss it with your team

Then there should be a lot of feedback between the writer(s) and the designer(s) because if you don't consider both from the very beginning, you have 99% chances to fail. It's the same thing for the characters, the type of environment, the background etc

If you just want to write a story and hope someone will turn it into a videogame, my advise would be to write a book or a script that will turn into a huge blockbuster/best seller and then saying "who wants to make a videogame out of it ?"

It depends, what type of game are you talking about?

I'm going to take a wild guess and say some sort of RPG so can't say much about that. I would assume the writers write the story, dialogue trees, ect as well as provide the setting. The designers and artist would create the spaces. For other games, typically, the writing is up to Creative Director I believe.

Also, if this is you, well, take some rhetoric and grammar classes first?

Besides that, it sounds like you're almost wanting to do a mod. If that's the case, don't just jump right in and start your own team. Join an established team and just learn the process. It sounds like you know absolutely nothing about the process and you're just going to count on others to know what to do and no matter how awesome your ideas are, your project will fail.

If you're not looking to do some sort of mod project and making your own indie studio, heaven help you because that is going to go down in flames even harder than the mod project.  I'm not trying to be an ass here, I'm just saying making your own game is a lot more difficult than just coming up with a good idea.