Released on March 23, 2010, Patch 1.13c is widely considered the definitive "Legacy" version of Diablo II. It was the last major update to introduce class balance changes until the release of Diablo II: Resurrected over a decade later.
: If the game fails to launch, set the compatibility mode to Windows XP (Service Pack 3) and check the "Reduced color mode" (16-bit) box.
Users should source portable versions from reputable community hubs to avoid malware.