I made a game in assembly that runs without an operating system. This is bare metal programming. Use this code for 6% off the GEEKOM A9 Max: INKA9MAX Amazon US: GEEKOM US: Amazon UK: GEEKOM UK: What's possible with UEFI? Graphics, input, output. It's everything you need to make a game (except for sound). Using x64 assembly I recreated Zaxxon as a UEFI application that runs without the support of an operating system. This program will run on any x86_64 machine. Check it out via the link down below. Open Source Project on GitHub: UEFI spec: EFI Toolkit repo (if you want C): EFI toolkit repo