It sounds obvious, but you can go to the websites of game campaigns in the sections job / career, as well as search on the profile sites. Groups with vacancies can be found on Facebook and on Telegram. Often there are job boards at conferences. LinkedIn has information about job fairs in the field.
Other ideas for searching:
- Passive search: post resumes on platforms and profile sites
- Find out through acquaintances in the industry
- Seek internships/courses at gaming companies
- Participate in hackathons -> expand your network
Several sites to start your search:
- linkedIn.com > Jobs
- dice.com
- indeed.com
- glassdoor.com
- monster.com
When I was getting ready for the transition, I gathered a pool of companies interesting for me in my city (at that time remote was not yet very common), I studied the open positions on the site, but if they were not, then I wrote an email to the HR department contacts listed on the site. I attached my CV, wrote about my motivation to work for this particular company and a request to keep my resume in the database in case there were any suitable openings. Often there is a separate 'Speculative Applications' / 'Spontaneous Application' section of the job/career section of the companies website, just for applications without a specific position.
If the position you are applying for is important to you, then you can find the company's hr in linkedin and write to him/her directly (that you have applied for a certain position and that the position is very important to you, that you hope your response will not get lost.. something like that:)
I would recommend applying to different campaigns to gain interview experience - listen to feedback and try again. Unfortunately, it's hard to advise anything here.
If there are no responses to your resume, you should try adjusting your resume in general and for each position, try to restructure it. Also, you can make your cover letter more personal, more capturing.