Battle.net user Abetus had come up with a concept for a card game based on Diablo II, though has been warned off since by a member of the forum’s technical support.
Choosing to base the project on Diablo II rather than Diablo III for nostalgic purposes, Abetus put forward the idea of a card game based on the second entry in the ARPG series. This would have consisted of each player using a class to play as, which they would then level up. There would be three loot decks available, with Normal, Nightmare and Hell being offered to players, of which an example can be seen below.
However, once posting the idea on the game’s official forums, and suggesting making a licensed product in co-operation with Blizzard, technical support member MissCheetah responded:
“I think you have a fun idea, but Diablo 2 and all the characters, art, etc are copyrighted to Blizzard. They own that intellectual property. You can’t legally make a derivative game. Doing so can open you to legal action.”
Even the suggestion of distributing the game for free was shot down, seeing as the rights are owned by Blizzard:
“You can not distribute it, not even for free. You don’t own the Blizzard intellectual property rights and as the FAQ says, they won’t license those rights to you. Blizzard has had their legal team take action against “free” Blizzard based products many times.”
A Diablo II would certainly be an exciting prospect, though getting it around Blizzard would be a task that is by no means worth the potential punishment. Perhaps if the request gained some leverage, it might prompt Blizzard into bringing a card game about based on Diablo II, though given that they already have a card-based property with Hearthstone, it might be a better use of their time to put their efforts into the next full Diablo entry.