: Popular fan-made mods like Project Diablo 2 or The Hell 2 are completely free to download, though they generally require you to own a legitimate copy of the original game files to run. Purchasing Options
While and its remaster, Diablo II: Resurrected , are paid games, you can access legal "free" options through certain subscriptions or archived media. If you are looking for the "Complete Edition" (often referring to the base game plus the Lord of Destruction expansion), here is how to get it: Legal Ways to Access Diablo II diablo-ii-complete-edition-pc-game-free-download
If you prefer a permanent copy, you can buy the classic or remastered versions: : Popular fan-made mods like Project Diablo 2
: The official Battle.net Shop sells the original Diablo II (2000) and its expansion. Diablo II: Resurrected