I am part of a team which act as an agency to a few large high street computer game retailers and publishers to ensure the get low cost marketing materials. I started out by opening new stores for the retailers and now work in mixed role which puts me in a position of working with graphic marketing materials at an early stage through to retail/launch. We would source and assist with everything from a major marketing campaign for a title launch/xmas/easter etc or just kitting out a store with unique POS, all pretty exciting stuff.
A recent campaign for modern warefare2 allowed us to budget for kitting out large stores with army kit and distributing limited edition stuff to drive hype around the launch of the title. We then used autographed copies of the game and posters to provide added value to the people queuing at midnight etc.
^ Part of my hand delivery for my local store for midnight launch. Can't fit much in the boot!
I've worked my way up over the past 3 years and it's something I never saw myself doing before I started (I wanted to be a pilot!).