Qualifications improve your chances; they do not gate the job. Level 3 is the most recognised.
Level 3 most recognisedOpen entry
Your route in
You can start without qualifications - direct entry/volunteering; a qualification improves your chances
1
Qualifications employers recognise (Level 3)
Any of these strengthens your application.
2
Where this can take you
With experience and further training, you could: become a quality assurance manager, move into games marketing and become a games designer, animator or games developer. If you're fluent in another language, you could check different language versions of games as a localisation tester.