I'm a sci fi writer trying to find work in vid games. Is there a section on this website where I can showcase my work?

Generally as a writer you would apply to someone recruiting for a game design project, rather than having a portfolio that prospective employers would look at when they are looking for someone to hire. You can have a portfolio on your computer that you email people, or you can create a portfolio website or use your account on a site like Archive Of Our Own, Fiction Press, WattPad, DeviantArt, etc and show it to people by sending them a link. Otherwise, what Stormynature said.