Dear Hiring Manager,

I saw on your website the job posting for a Game Tester and it immediately caught my attention. I am interested in pursuing a career as a developer and this opening would be a great starting point, because I believe games are very educational and can help improve our problem solving skills. As you can see from my enclosed CV, I hold a degree in [degree name] and have studied IT related subjects in high school as well, which I think will come in very useful in my daily tasks.

I would love to discuss this opportunity with you so I hope to hear from you very soon.

Sincerely,

[your name]