Have not seen anyone mention that:

Torchlight 1 is akin to Diablo 1 singular overworld random dungeons
Torchlight 2 is akin to Diablo 2 with hub based world and random dungeons

For more Diablo clones i would highly suggest:

Van Helsing: Final Cut - lots of play style and story
Victor Vran - more about gameplay then story
Titans Quest - static huge unforgiving, god of war arpg themed
Grim Dawn - same as TQ but darker, more gothic, horror, tons of loot and skills
Shadows: Heretic Kingdoms - unique game that feels like shadows of mordor ARPG
Shadows: Awakening - more of the same but better action
Sacred 1 and 2 - they almost feel like indie games but also sort of polished in a way
Vikings - Wolves of Midgard - use a controller, basic clone, norse themed, very pretty

These are the best options on GOG that have a diablo like feel to them. There are a bunch more but I they stray to far from the diablo formula. The only true clones are the Torchlights as the rest dont have that random generated world scape.

For my $$$ to capture the Diablo feeling Grim Dawn is about the best you can get, or maybe Van Helsing.

One of my personal favorite diabloids (along with Harbinger and Hellgate)

Playing it now, it's not so bad in fact.

And it seems no one still hasn't mentioned NightStone. Not a perfect game by far but not bad either. Bro, you made me happy to know that someone else besides me in the whole world does know this little gem :)

Then you have Hellgate;London: a very ambitious game by the designers of Diablo 1 and 2 that tried to take this kind of game to a new level. For one thing, they made it a hybrid Fantasy/Sci Fi game.

But is proved to be a huge disappointment. The desginers themselves said they were too ambitious,they tried to pack too much into a single game,they should have been more focused. It was one of the biggest bombs in the history of compuer gaming. It has been twice revived, but looks as thought the current revival will be no more successful then the first revival.

Main problem is single player play gets really repetitious after a while. Too many of the levels play the same. you get tired fighting you way through sewer and subway tunnels after a while,since they all look and play pretty much the same.
I don't think it is quite as bad as legend has it,..parts of it are fun.... but no doubt it was came nowhere near to living up to the massive hype it got in 2006, and was a huge disappointment.

Darksiders Genesis is being released soon and it looks like a diablo esk type game, tbh I'm stoked for this and hope it is really fun to play.

https://www.youtube.com/watch?v=tfziRNV4ujA

I know old post.

But, the main issue with calling TL a clone here is that a lot of the original developers worked on it. Diablo III OTOH, is more or less a clone as none of the original people were involved and they seem to have guessed what they thought the formula was to make it work.

To hell with false revivals! Just try this TRUE revival.

Nope. It is not going to be like Diablo at all. It will just be a Darksiders game with top-down perspective. And being top-down does not automatically mean Diablo clone.

Question is can direct sequel really be a clone?
I thought that clone meant a game not in the original franchise that tries to be a much like the original as possible. Not sure a authorized sequel fits, even if the design team is different.
Seems to be very much multi player oriented.
ANyway, IMHO it's an attempt to revive a game which, whatever it's potential was;turned out to be medicore at best, and many of the reasons why are things no mod could fix.
People can, of course, do what they want,but IMHO Hellgate"London was a misfire I probably won't bother playing again.

From a strictly technical standpoint, probably not. But, it's rare for a sequel to be produced so many years later without having anybody at all related to the original running it. For all intents and purposes, the Blizzard that produced the first 2 games in the series is not the Blizzard that produced D3 and it shows.

Even in the case of Wasteland 2, there was at least some presence from the original team guiding it.

Baldur's Gate Dark Alliance 1 & 2 are console Diablo style games. Quite liked them.

EDIT: Sorry didn't see it was previously mentioned...

Shadows awakening is good clone or Titan quest. Vikings Wolves of Midgard. have fun.

Yes, as suggested before, Sacred I & II; Sacred II had some very interesting skill options. Clustering Maelstrom was a hoot!

Titan Quest: Of all the Diablo-esque games I've played, this game had the most ingenious skill-system. . . just brilliant.
There are 9 skill trees (masteries). . . you can focus on one "mastery"/class, or branch out into a second mastery, which creates a unique class . . . at level 8 I think. Whatever your second choice, it will synergise with your initial mastery . . I mean good, effective synergies. . . any 2 masteries. I think that's just flat-out amazing. A lot of planning, thought, and imagination went into TQ's skill system. I think, all in all, there are a total of 45 classes. I think I played at least 20, and they were all effective and fun to play. . . lots of replay-ability. There's some decent mods for the game as well.

I can recommend Grim Dawn (as many wrote, too), since it was developed by a small dev team, one of the view devs that really finished their (steam) early access game. The "feeling" you get while playing is kinda Diablo-like, dark, grim, evil and unforgiving. People struggle in their fight to survive within a world of demons - monsters as well as human ones. A bit like the witcher "Abigail: What about your sword? I heard witchers carry two - a silver blade for monsters and steel for humans... Geralt of Rivia: Both are for monsters." ;-)

Other options
- Titan Quest
- Torchlight 1 & 2...similar gameplay, but those two are way more colorful and not as dark as Diablo
- Victor Vran ...a step further in time, since you have basic guns like early pistols and shotguns, but still similar gameplay (tho more D3-like than D1&2) but the setting fits. But: Campaign is quite short, do not expect anything nearly as long as D2 or even D3
- Sacred 1 & 2 ...tho Sacred 2 has another "style" than D1&2 (because way further down the road of game development age) but Sacred 1 might be comparable)
- Path of Exile (free-to-play, was not my "thing", I've heard it becomes more and more pay2win or at least pay2progress towards lategame)
Well, thats what I can think of, as far as you want the classic isometric point of view. If 3rd person and 3D would be an option too, there would be a looot more options^^