The screenplay form

I read several tutorials about how to write a good screenplay and what the form it should be like. It's really interesting because this the first time I learn something about working for a game screenplay. 

What I have read is related to the Hollywood film, not for a game. Although there will be some differences for a screenplay for a game. For instance, it might better to write a screenplay in Excel that could be applied by programmers later.  But it's still wathe to write down some information, such as V.O. because sometimes the character in the game may not in the scene. This means we don't need to prepare the animation of this character for this line but still need the CV to work for it.

Another what I learn is that the form restraints the font and its size and line space, etc. This sort of form could turn one page of the document into one minute of the film. The director could evaluate how long the film would be made.