There is currently no official "demo" or trial ISO that you can download for free. Personalized Builds: When you purchase a license, Arca Noae builds a personalized ISO
If you insist on bare metal, look for used "Legacy" hardware: Intel Core 2 Duo or 1st-gen Core i-series (Nehalem/Sandy Bridge) with legacy BIOS mode. Do not try to install on a 2024 gaming laptop; it will likely fail due to ACPI and GPU incompatibilities. arcaos 51 iso free
To get a legitimate copy of the ArcaOS 5.1 ISO, you must purchase a license through the official Arca Noae shop. There is currently no official "demo" or trial