TWENTY-FIFTH SUPPLEMENTAL INDENTURE FOR ADDITIONAL SUBSIDIARY GUARANTEES

Exhibit 4.2

TWENTY-FIFTH SUPPLEMENTAL INDENTURE FOR
ADDITIONAL SUBSIDIARY GUARANTEES

      Twenty-Fifth Supplemental Indenture (this “ Supplemental Indenture for Additional Guarantees ”), dated as of October 5, 2009, among NRG Retail LLC, Reliant Energy Power Supply, LLC, Reliant Energy Retail Holdings, LLC, RERH Holdings, LLC, Reliant Energy Retail Services, LLC and RE Retail Receivables, LLC (each a “ Guaranteeing Subsidiary ” and together the “ Guaranteeing Subsidiaries ”), each an indirect subsidiary of NRG Energy, Inc., a Delaware corporation (the “ Company ”), the Company, the Existing Guarantors set forth on the signature page hereto (the “ Existing Guarantors ”) and Law Debenture Trust Company of New York, as trustee under the indentures referred to below (the “ Trustee ”).

W I T N E S S E T H

     WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture (the “ Base Indenture ”), dated as of February 2, 2006, between the Company and the Trustee, as amended by a second supplemental indenture (the “ Second Supplemental Indenture ”), dated as of February 2, 2006, among the Company, the Guarantors named therein and the Trustee, providing for the original issuance of an aggregate principal amount of $2,400 million of 7.375% Senior Notes due 2016 (the “ Initial Notes ”), and, subject to the terms of the Indenture, future unlimited issuances of 7.375% Senior Notes due 2016 (the “ Additional Notes ,” and together with the Initial Notes, the “ Notes ”), a fourth supplemental indenture, dated as of March 14, 2006, among the Company, the Existing Guarantors party thereto and the Trustee (the “ Fourth Supplemental Indenture ”), a sixth supplemental indenture, dated as of April 28, 2006, among the Company, the Existing Guarantors party thereto and the Trustee (the “ Sixth Supplemental Indenture ”), an eighth supplemental indenture, dated as of November 13, 2006, among the Company, the Existing Guarantors party thereto and the Trustee (the “ Eight Supplemental Indenture ”), an eleventh supplemental indenture, dated as of July 19, 2007, among the Company, the Existing Guarantors party thereto and the Trustee (the “ Eleventh Supplemental Indenture ”), a fourteenth supplemental indenture, dated as of August 28, 2007, among the Company, the Existing Guarantors and the Trustee (the “ Fourteenth Supplemental Indenture”) , a seventeenth supplemental indenture, dated as of April 28, 2009 among the Company, the Existing Guarantors party thereto and the Trustee (the “ Seventeenth Supplemental Indenture”) , and a twentieth supplemental indenture, dated as of May 8, 2009 among the Company, the Existing Guarantors and the Trustee (the “ Twentieth Supplemental Indenture” and together with the Base Indenture, the Second Supplemental Indenture, the Fourth Supplemental Indenture, the Sixth Supplemental Indenture, the Eighth Supplemental Indenture, the Eleventh Supplemental Indenture, the Fourteenth Supplemental Indenture and the Seventeenth Supplemental Indenture the “ Indenture ”);

     WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiaries shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiaries shall unconditionally guarantee all of the Company’s Obligations under the Notes and the Indenture (the “ Additional Guarantees ”); and

     WHEREAS, pursuant to Section 4.17 of the Second Supplemental Indenture, the Trustee, the Company and the other Guarantors are authorized and required to execute and deliver this Supplemental Indenture for Additional Guarantees.

     NOW THEREFORE, in consideration of the foregoing and for good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiaries, the Trustee, the Company and the other Guarantors mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

     1.  Capitalized Terms . Unless otherwise defined in this Supplemental Indenture for Additional Guarantees, capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

     2.  Agreement to be Bound; Guarantee . The Guaranteeing Subsidiaries hereby become parties to the Second Supplemental Indenture as Guarantors and as such will ha