Kegisak will probably know more about this, but I think the game companies will be more impressed if you can show them a portfolio showing off your skills at writing specifically for video games.
Well, yes and no. When most companies have applications for writing positions, they tend to ask for 'examples of published work', or a similar wording of the same concept. Larger studious will only take published authors, but in theory you should be able to do it with a short story or script. Demonstrating proficiency in scriptwriting is
good, since that's the format you'll be working in, but it rarely seems to come up in job postings.
Overall, I think this is actually a mistake in the hiring process, because it leans on talent with traditional storytelling, which doesn't
work for video games. It
can, of course -
To The Moon, Persona4, and many other games have much more solid, traditional story structures and are very good both as games and stories. Nevertheless, too few authors, I Think, really understand how to get the player invested in a playable story, which is why you get things like
Gameplay and Story Segregation, and games with 2 minutes of cutscene to every minute of gameplay. Ideally, the story in a video game is incredibly subtle, and largely crafted by the player. It's told through dialogue and the environment.
Interestingly, video game storytelling has a lot more in common with musical theatre than movies - in a musical the bulk of the story is told in big pops, through songs, and the times that aren't songs are usually just kinda there to string the songs along. Video games tend to do it the opposite way when they have large stories - the levels are just there to bridge the cutscenes. It
should be the opposite though, with levels being the big pop moments, and the cutscenes, if they even exist, bridging the levels together.
But yeah, most companies will ask for traditional writing experience, despite that not really being what they need.