Here's the thing people, we should not have to glitch this game to get NM and HELL on single player games. With the $10 that we payed, the hellfire expansion should have been included in the game. Hellfire includes 8 dungeon levels, NM and HELL on single player, Monk+Barbarian+Bard classes,1 extra level spells,extra quests,jogging in town, Pepin's automatic healing and more.... As you can see, there is MUCH more stuff in hellfire than the vanilla Diablo.
Not only that, but Blizzard are ungrateful. They literally COPIED Hellfire's novelties, into diablo 2; which partly owes to Hellfire, what it is (running, runes/traps/bombs, Barbarian, crypt -> act 1 monastery, nest -> act 2 maggot lair) and drew both inspiration and gameplay elements, from it. Blizzard are really evil. Plus, they separate us, gamers and collectors, from a gem of the past that deserves recognition and we really want it.
Worst of all, GOG's performance. They ditched a silent rule, on this one: "Bring complete editions/versions of a game, bundled up in packages/collections". And they no longer treat games with special care, like filling them to the brim with extras; hell, this masterpiece lacks even the legendary SOUNDTRACK, of all things!
Now, imagine the Warcrafts that are to follow, to also lack that soundtrack... Warcraft/Diablo without soundtrack... Like sweets without sugar, like car without wheels, like mirror without glass, like coffee without caffeine...