The browser version was reconstructed from the source code of the Diablo shareware version of the game, previously distributed on demodiski, called Devilution. Therefore, in free mode, only two locations are available and a few characters for conversation. If you have Diablo, you can use its main data file DIABDAT.MPQ to unlock the full version and continue the game in the browser. If not, then you need to purchase a digital copy on the GOG for $ 9.99, which includes the Hellfire extension.
True, in the first days after the launch of the site, there were so many people who wanted to play that they "put" the project site. Therefore, those who want to play just need to download the SPAWN.MPQ file from Github (links are provided) and put it into the browser – the game will start after this procedure.
Since the project is written by enthusiasts, the copyright holder Blizzard may request to stop the spread of the game. Although the developers do not take money for their work and use the demo version, so legally everything is fair. Programmers hope that Blizzard will not take any action against the project.
Read also: Netflix will release a documentary about the murder of the founder of The Rolling Stones
At one time, the success of Diablo allowed Blizzard to release a no less successful sequel, called Diablo II in the middle of 2000, and 12 years later Diablo III was released. Initially, we managed to sell two million copies, but the sequels surpassed the success of the original, selling six and 20 million copies of Diablo II and Diablo III, respectively.