Larian Studios
https://www.kickstarter.com/projects/1468280928/shards-online-play-by-your-rules
For those of you who were fans of Neverwinter Nights this looking like the closest thing to a sucessor for awhile. Thankfully it has already reached its initial funding goal a few days after the kickstarter was launched which shows how popular the idea is. The devs are pretty open minded and the community is made up of NWN and UO players so anyone from either game should feel pretty at home. The amount of customization available to player run Shards is arguably even more than NWN with pretty much every aspect of the gameplay being modifiable. A dev already confirmed that it would be theoretically possible to write a D&D based ruleset as Lua the scripting language their game is using is quite flexible. I encourage folks even if they do not choose to back the money wise just yet to sign up on the forums and make yourselfs a part of the community so that we have our voices heard in shaping this game.
https://www.youtube.com/watch?v=hTKj0NC_j8g First look at the toolset
nice discovery. although, 2 posts just for PR are a bit like spam.
19 hours left until this KS closes down back this while you can!
Four year update:
Legends of Aria announced it's early access date for STEAM launch which is December 4th. You can view their newest trailer which showcases the graphics update they implemented a couple months ago which brings LoA closer to Divinity Original Sin 2 style. Watch the trailer here https://www.legendsofaria.com/legends-of-aria-launches-on-steam-this-december/

Additionally, while modding tools will not be made availabile until full launch the team has opened up their community admin program to those who wish to apply; which now includes support for custom maps. For those interested here is more information: https://www.legendsofaria.com/community-admin-program-expansion/
Legends of Aria is going open beta this weekend before launching on STEAM. You can register here https://www.legendsofaria.com/open-beta-weekend/
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