Upon switching to a hybrid free-to-play model it was renamed Dungeons & Dragons Online: Eberron Unlimited.

The game was rebranded Dungeons & Dragons Online, with the introduction of Forgotten Realms-related content.

The initial prototype and concept were created by Jason Booth, Dan Ogles, Cardell Kerr, Ken Troop, and Michael Sheidow, in coordination with Wizards of the Coast, the publisher of Dungeons & Dragons.

[4] In June 2009, Dungeons & Dragons Online reopened beta testing, in preparation for their new free-to-play subscription structure.

The magazine described as the "first MMORPG to prove that free-to-play payment plans were viable alternatives to the then-dominant subscription model".

[33] On August 24, 2009, Turbine, Inc. filed lawsuit against Atari claiming a breach of a licensing agreement for Dungeons & Dragons.

The suit alleged six counts over six years, including consistent breaches of contract, a lack of promotion and distribution, and attempting to gain additional money from Turbine's licensing of the D&D properties.