Rivsoft has re-coded Blizzard's original Diablo (1996) and made it a browser game. How portal PC Gamer, it can anyone who wants. In the free version, the first 2 dungeons and one character class are available. The browser port is reportedly based on a "reverse engineered" and "contains all the bugs and bad code of the original game."
For full access, you will need to have a purchased game. To run the full version, the user needs to find the DIABDAT.MPQ file and drag it into the browser. Also, anyone can buy it in the store. .
In March 2019, Diablo was released on the GOG store. The composition includes the classic version without changes (with a limit of 20 fps and multiplayer in Battle.net) and an updated version adapted for modern operating systems. The latter fixes several in-game bugs.
Source: 3dnews.ru