Gaming employers in the Puget Sound region
I'm a local (well, transplant, but I've lived here 10 years), and the folks I know personally who are in the "professional gamer" world in some way work at Microsoft, Nintendo, and Valve.
Nintendo's US offices are in Redmond, right in with some Microsoft stuff.
Oh, Big Fish is yet another (electronic) gaming company, and I know two people who interviewed, but didn't get jobs.
And Electronic Arts is big north of the border, but Vancouver ain't technically Seattle, so probably not there.
Oh, and PennyArcade is here, but I don't know if they have employees.
Plus, I'm sure there's a ton of small electronic and non-electronic game companies, like the guys who invented Cranium are from here. Random stuff like HeroClix too, I think. And I knew a guy who worked for Sierra, testing some update of Leisure Suit Larry -- yes, being a game tester can be a bad job! But I think Sierra is mostly in Nor Cal . . .