Right-click on part1 and select "Extract Here." The software will automatically pull data from the other parts to recreate the full installer or game folder.
If you didn't download this from an official storefront like , GOG , or the Humble Store , be cautious. Files from third-party sharing sites can sometimes be bundled with malware. Always run a virus scan on the extracted folder before launching the game. game-terraria-(60319).part1.rar
The number in parentheses usually indicates a specific build or version number (often associated with DRM-free installers like those from GOG.com). Right-click on part1 and select "Extract Here