The .7z extension indicates a high-compression archive created by , an open-source tool developed by Igor Pavlov . In the context of Diablo II, players often use this format to:
: Once installed, right-click the d2.7z file and select "Extract Here" or "Extract to d2/" to unpack the contents into a usable folder. 7zip Malware: Beware 7zip.com
While modern Windows versions can open ZIP files natively, you generally need a third-party utility to extract a .7z file.