Describe your achievements through your work experience, skills, and education. Your name and contact info should be at the top of the resume. You may present an optional summary or objective section detailing who you are, what you've done, and why you are applying to the job. Work experience and education should be listed in reverse chronological order. The skills section can include hard skills, soft skills, or both. You can describe your skills by listing out accomplishments or graphical aids depicting your skill level. Education and academic achievements are usually placed at the bottom of the resume. You should keep your resume up to date as you make new accomplishments and advance your career.
Cover letters should be clear, concise, and to the point, written specifically to address the description and requirements in the job listing. Explain how you are qualified for the role and describe any past achievements that proves your qualifications. Describe your aptitude on related skills based on work you are currently doing. Make it clear that you have the skills for the job and can solve problems the studio might be facing. Show interest in the studio by noting the experiences you had from playing their games.
Tailor your portfolio to showcase your best work. Do not show all of your work. Your portfolio is only as strong as its weakest piece.
Showcase your best work for the position that you are applying to. Do not show work that is irrelevant to the position, as it might confuse the hiring manager.
Some disciplines are more challenging to showcase hard skills, like Production. More often than not, your Resume and Cover Letter will be sufficient to convey your skills. The gallery of game credits in your portfolio just acts as a quick visual aid of your achievements.