Exhibit 4.1

SUPPLEMENTAL INDENTURE, dated as of September 15, 2014 (this “Supplemental Indenture”), by and among Scientific Games Corporation, a Delaware corporation (the “Company”), the Guarantors (as defined in the indenture referred to herein), Scientific Games Productions, LLC, a Nevada limited liability company, and Scientific Games Distribution, LLC, a Nevada limited liability company (collectively, the “Additional Guarantors”), and Deutsche Bank Trust Company Americas, a New York banking corporation, as successor trustee (the “Trustee”).

WHEREAS, the Company, the original Guarantors and the Trustee executed an Indenture, dated as of September 22, 2010 (the “Indenture”), relating to the Company’s 8.125% Senior Subordinated Notes due 2018;

WHEREAS, under certain circumstances, Section 11.17 of the Indenture requires the Company to cause each of the Company’s Restricted Subsidiaries to execute and deliver to the Trustee a supplemental indenture and thereby become a Guarantor bound by the Guarantee of the Securities on the terms set forth in Article Eleven of the Indenture;

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture; and

WHEREAS, except as otherwise defined herein in this Supplemental Indenture, capitalized terms used in this Supplemental Indenture have the meanings specified in the Indenture;

NOW, THEREFORE, in consideration of the above premises, each party agrees, for the benefit of the other parties and for the equal and ratable benefit of the Holders of the Securities, as follows:

ARTICLE ONE
AMENDMENT

Section 1.01.  Amendment.  Each of the Additional Guarantors hereby agrees to become a Guarantor bound by the Guarantee of the Securities on the terms set forth in Article Eleven of the Indenture.

ARTICLE TWO
MISCELLANEOUS PROVISIONS

Section 2.01.  Indenture.  Except as amended hereby, the Indenture and the Securities are in all respects ratified and confirmed and all their terms shall remain in full force and effect.

Section 2.02.  Trustee’s Disclaimer.  The Trustee shall not be responsible for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Company and the Additional Guarantors.

Section 2.03.  Governing Law.  THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS

OF LAWS TO THE EXTENT THAT THE APPLICATION OF THE LAW OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

Section 2.04.  Counterparts.  This Supplemental Indenture may be executed in any number of counterparts, each of which shall be an original, but all of them together shall represent the same agreement.

Section 2.05.  Headings.  The Article and Section headings in this Supplemental Indenture are for convenience only and shall not affect the construction of this Supplemental Indenture.

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SIGNATURES

IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed, all as of the date first written above.

Company:

SCIENTIFIC GAMES CORPORATION

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Vice President-Worldwide Legal Affairs

and Corporate Secretary     

Additional Guarantors:

SCIENTIFIC GAMES PRODUCTIONS, LLC

By: SG Gaming North America, Inc., its sole member

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Vice President and Secretary

SCIENTIFIC GAMES DISTRIBUTION, LLC

By: SG Gaming North America, Inc., its sole member

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Vice President and Secretary

Existing Guarantors:

WMS INDUSTRIES INC.

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: General Counsel and Secretary

Signature Page to Supplemental Indenture-2018 Notes

WMS GAMING INC.

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: General Counsel and Secretary

WMS INTERNATIONAL HOLDINGS INC.

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: General Counsel and Secretary

PHANTOM EFX, LLC

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Manager

LENC-SMITH INC.

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: General Counsel and Secretary

WILLIAMS ELECTRONICS GAMES, INC.

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: General Counsel and Secretary

WMS FINANCE INC.

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: General Counsel and Secretary

LENC SOFTWARE HOLDINGS LLC

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Manager

Signature Page to Supplemental Indenture-2018 Notes

WILLIAMS INTERACTIVE LLC

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Manager

SCIENTIFIC GAMES INTERNATIONAL, INC.

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Vice President, General Counsel and     

Secretary

SG GAMING NORTH AMERICA, INC.

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Vice President and Secretary

SCIENTIFIC GAMES PRODUCTS, INC.

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Vice President and Secretary

MDI ENTERTAINMENT, LLC

By: Scientific Games International, Inc., its sole member

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Vice President, General Counsel and

     Secretary

SCIENTIFIC GAMES SA, INC.

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: General Counsel and Secretary

Signature Page to Supplemental Indenture-2018 Notes

SCIPLAY INC.

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Vice President and Secretary

SCIENTIFIC GAMES NEW JERSEY, LLC

By:  Scientific Games International, Inc., its sole member

By:    /s/ Jack B. Sarno                    

Name: Jack B. Sarno

Title: Vice President, General Counsel and

         Secretary

Signature Page to Supplemental Indenture-2018 Notes

Trustee:

DEUTSCHE BANK TRUST COMPANY AMERICAS

By:    /s/ Chris Niesz                

Name: Chris Niesz

Title: Assistant Vice President

Signature Page to Supplemental Indenture-2018 Notes