If you love computer games and enjoy working through things in a methodical way, this could be a great job for you. Games testing is a popular way of starting out in the games industry. It can be a good way to find out about the business as a whole. As a computer games tester it would be your job to play games many times to spot any bugs and mistakes that need to be fixed before the game goes on sale.
You don't need formal qualifications to become a tester. Your playing skills and knowledge of the games market will be more important to employers.