To become a game developer with no experience in the UK, you can start by posting your work on discussion boards, building your own indie games, starting a gaming blog, or getting an entry-level job as a game tester. You can also consider getting an internship at a video game studio or pursuing a video-game related college degree or a traditional college degree.

Entry-level game developers are responsible for programming the algorithms and code that control video games. They develop action sequences, graphical user interfaces, and other basic tools that allow seamless gameplay.

A junior game developer in the UK is responsible for coding games, designing graphics, developing games for specific gaming consoles or computer operating systems, testing games for bugs, and creating and optimizing testing programs and processes to ensure that each game meets a company's standards for its final products.

The career path of a game developer typically involves earning a degree in computer science, animation, or a related field, attending a coding bootcamp specializing in game development, or self-teaching using resources available on the internet. As a Junior Game Developer in the UK, you may start with entry-level positions and work your way up to more senior roles, such as Lead Game Developer or Game Designer.