I work at Codies. I'm in dev, not QA, but spend a lot of time with the QA guys. Just say that you're willing to work hard. Offer that you're willing to work overtime. Lots of overtime. They'll love you!
Knowledge of games is important, but don't get carried away saying how much you love playing games. It might give the impression you think the job involves sitting around playing different games all day! It's not!
"I'd like to get across the fact that I have a good knowledge of games, and am not a twat who basically thinks that a games testers job is basically about having fun all day playing games...I know fully well it is hard work, and I intend to stay commited to the job if I get it. But I can't just put that in my CV, now can I?"
Absolutely do say that! It's common to stick a 'Personal Profile" at the start of a CV now, and that's a single paragraph (or two) about who you are and why you'd be good for the position.
As a tester you'll be testing the same game every day for weeks, probably months. And you're not playing, you're testing. You won't be looked at to offer loads of insight into gameplay balancing, there are full-time games designers employed for that. You'll be working to a strict testing plan; you might have to continuously test a single screen of a football management game for a few days. Or sit there pulling a memory card in and out of a PS2 on different screens of am front-end for hours on end!
I'm not trying to put you off it, I'm just trying to give you an insight into what testings about.
Other tips; you'll need a very good command of written english. You'll be expected to write logical, well-structured details of how to reproduce a bug for the development team to look at. No spelling mistakes!
Show good verbal communication skills too, so that you can explain details about a bug.
CV Stuff? ;
A ) Hard working; Show other jobs you've had
B ) Exam results; English and Maths are probably the most important
C ) PC literate;
1) You'll need to be able to use bug-tracking databases
2) Being able to encode AVIs of bugs you've caught on video is part of the job (but you'd get training).
3) Good keyboard-skills. You'll be typing up your bug reports.
D) Games knowledge.
E) Foreign languages - you'll be testing the foreign-language versions too, so any basic knowledge of other languages is a help.
It's a big ol' QA department, but there's a good atmosphere there!
Hope that's helpful. Good luck!
Nifta