: Right-click part1.rar and select "Extract Here" using a tool like WinRAR or 7-Zip . It will automatically pull data from all other parts to recreate the full ISO file.
: There are comprehensive playlists available on YouTube, including Part 1 Walkthroughs that cover the early stages of the game. Mysteria.Occult.Shadows-CODEX.part1.rar
: For troubleshooting or finding save file locations, check the PCGamingWiki page . Mysteria~Occult Shadows - Steam Community : Right-click part1