Diablo Free: Download (gog)

: You can play a limited "shareware" version of the original Diablo directly in your browser through projects like Rivsoft.

: In the expansion's non-canonical story, a new darkness emerges. A powerful demon named Na-Krul threatens to escape into Tristram. Trapped in his lair by a sorcerer, you must delve into new dungeons and master new skills—perhaps as a Monk —to stop this secondary horror from joining the Lord of Terror's reign. Ways to Play Diablo Free Download (GOG)

If you are looking for free ways to experience the classic, there are limited options: : You can play a limited "shareware" version