To repurpose an old PC and turn it into a full-fledged gaming and media center, start by installing a lightweight operating system like Linux or an older version of Windows to reduce system resources. Install gaming software like Steam or an emulator to run your favorite games, including
Geometry Dash Scratch, which takes advantage of your machine's power to play these games. To enhance the experience, install video and audio playback applications, and set up a Home Theater PC (HTPC) system to play content from online services.