Video Game writing has become legitimate (although it really always was), as evidenced by their inclusion in the Writer's Guild Awards.
Assassin's Creed: Brotherhood, Story by Patrice Desilets, Jeffrey Yohalem, Corey May; Lead Script Writer: Jeffrey Yohalem; Script Writers: Ethan Petty, Nicholas Grimwood, Matt Turner; Ubisoft
Fallout: New Vegas, Creative Design Lead/Lead Writer:John Gonzalez; Writers: Chris Avellone, Eric Fenstermaker, Travis Stout; Additional Writing: Tess Treadwell, George Ziets, Jason Bergman, Nick Breckon, Matt Grandstaff, Will Noble, Andrew Scharf; Bethesda Softworks
God of War III, Written by Marianne Krawczyk; Additional Writing by Stig Asmussen, Ariel Lawrence, William Weissbaum; Sony Computer Entertainment
Prince of Persia: The Forgotten Sands (Wii), Writer:Benjamin McCaw; Story Dialogue Editor: Marianne Krawczyk; Ubisoft
Singularity, Written by Marc Guggenheim, Lindsey Allen, Emily Silver; Additional Story and Writing: Jason Henderson, Adam Foshko, Michael Cassutt; Story and Script Consultant: Adam Foshko; Activision
Star Wars: The Force Unleashed II, Executive Producer-Writer: Haden Blackman; In-Game Script: David Collins, John Stafford, Cameron Suey; Additional Writing: Tid Cooney, Ian Dominguez, Tony Rowe; LucasArts
You may have noticed some of the best writing from last year missing from the list. Why? You kind of have to participate.
Now the general process of video game writing is very different from that of a screenplay or teleplay. In most cases, the gameplay, level design, and story is already decided. The writer is usually employed to add dialog and make sure everything hangs together. The scripts are also much, much, longer.