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About me

I am a professional game developer, designer, producer, and one of the industry's leading attorneys on matters relating to the cutting edge of online gaming.  My clients range from AAA studios to indie developers, on platforms ranging from VR/AR to PC/Mac, mobile, web, AAA consoles, and handhelds.  As a veteran, and a diplomat, I bring a unique blend of problem-solving experience to my representation and counsel of clients. 


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Practice areas


  1. Gaming: 65%
    6 years
  2. Internet: 15%
    6 years
  3. Entertainment: 10%
    6 years
  4. Intellectual Property: 5%
    6 years
  5. Computer Fraud: 5%
    6 years



Hourly ($100-350/hour), Fixed (sometimes), Retainer (sometimes)

Attorney endorsements

12 total 

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  • Howard M Lewis

    I endorse this lawyer. Attorney Rosenthal is one of the best IP attorneys in his state. He has an exceptional reputation and is a credit to the legal community. I highly endorse his legal services.


    Howard Lewis Divorce and separation Attorney
    Relationship: Fellow lawyer in community

  • Ray Beckerman

    I endorse this lawyer. Daniel is an active Avvo participant, and his answers to questions show very good judgment. He knows that being a good lawyer is not just about giving technical answers to technical questions, but also about seeing the big picture.


    Ray Beckerman Copyright infringement Attorney
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We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
#1 Ranked Gaming Law AttorneyAvvo.com2016
#1 Ranked Gaming Law AttorneyAvvo.com2015
#1 Ranked Gaming Law AttorneyAvvo.com2014
#1 Ranked Gaming Law AttorneyAvvo.com2013
Top 10 Entertainment LawyersAvvo.com2012
#3 Ranked Internet Law AttorneyAvvo.com2012
#1 Ranked Gaming Law AttorneyAvvo.com2012
Top Secret Security ClearanceDepartment of State2010
GDC ScholarInternational Game Developers Association2008
Presidential Unit CitationU.S. Army2004
Army Commendation MedalU.S. Army2004
Combat Infantry BadgeU.S. Army2003
Work experience
TitleCompany nameDuration
Managing PartnerLeifLaw2011 - Present
Chief Business Development and Legal OfficerTheGameNet2010 - 2012
Association namePosition nameDuration
Maryland State Bar AssociationAttorney Member2011 - Present
Federal Bar Association (Maryland chapter)Member2011 - Present
Montgomery Country Bar AssociationMember (Young)2011 - Present
Veterans of Modern WarfareBoard of Directors2010 - 2011
International Game Developers AssociationIP Rights Steering Committee2010 - 2012
International Game Developers AssociationSIG Co-Chair2009 - 2012
IP BriefSenior Editor2009 - 2010
Wikimedia DCChair2007 - 2011
American JuristDirector (Editor)2007 - 2009
Iraq War Veterans AssociationBoard of Directors2005 - 2009
Legal cases
Case nameOutcome
FCC Advocacy for Game Industry CoalitionSuccessful
Game related contract reviewClient satisfied
Review of Non-Compete/IP assignmentClient satisfied, and successfully opened new studio.
See all legal cases 
Publication nameTitleDate
Washington College of Law Student PapersAvatar Rights: Applying a Human Rights Framework to Virtual Worlds and MMOGs2010
IP BriefVolume 2 (Senior Editor)2010
Student Written Papers, Pence Law Library.Competing Theories of Cyberspace Jurisdiction in MMORPGs and Virtual Worlds: Why the Harmful Effects Doctrine Must Emerge Victorious2009
IP BriefVolume 1 (Senior Editor)2009
American JuristAmerican Jurist, 2009 (Director)2009
American JuristAmerican Jurist, 2008 (Director)2008
American JuristAmerican Jurist, 2007 (Director)2007
International Intellectual Property & Related Legal Issues In Virtual Worlds (ABA Press: forthcoming)Technical ChapterN/A
School nameMajorDegreeGraduated
American University, Washington College of LawLawJD - Juris Doctor2010
Florida State University College of LawPolitical ScienceOther - Bachelors2007
Speaking engagements
Conference nameTitleDate
PAX EastLegal Issues in Games2011
Game Developers Conference 2011Business and Legal SIG Roundtable2011
PAX 2010Legal Issues in Gaming2010
Game Developers Conference 2010IP SIG Roundtable2010
PAX 2009Legal Issues in Gaming2009
PAX 2008Legal Issues in Gaming2008