I started playing the Reign of Terror mod with a friend. It's basically a 1-man project to eventually bring all of D2 + LoD into the Grim Dawn engine, and let me tell you the dude is phenomenal. Every zone is unique, and is far more atmospheric than even the original. All voice acting, and music has been imported from D2. Played on Veteran with my buddy, and we ended up getting our shit pushed in more than we'd like. Andariel was harder than any GD or D2 boss I can recall. Unfortunately, he's only approx. 50 - 60% finished with Act 2, and ran into some copyright issues with Blizzard in the past, but he seems to have worked around them, and gotten a 2nd modder to help him finish up faster. I think the Black Marsh may have been my favorite zone we've currently completed, which is odd, since I fucking hated it in the original.
http://www.grimdawn.com/forums/showthread.php?t=47624