Joinder Agreement

Exhibit 10.5

Joinder Agreement

August 13, 2013

J.P. Morgan Securities LLC

Goldman, Sachs & Co.

Deutsche Bank Securities Inc.

Merrill Lynch, Pierce, Fenner & Smith

                    Incorporated

Wells Fargo Securities, LLC

Credit Agricole Securities (USA) Inc.

Barclays Capital Inc. UBS Securities LLC

As Representatives of the several

    Initial Purchasers named in Schedule 1 of the Purchase Agreement

c/o J.P. Morgan Securities LLC

383 Madison Avenue

New York, New York 10179

Reference is hereby made to that purchase agreement (the “Purchase Agreement”) dated as of July 30, 2013 among PNK Finance Corp., a Delaware corporation (the “Issuer”) and wholly-owned unrestricted subsidiary of Pinnacle Entertainment, Inc., a Delaware corporation (the “Company”), and the Initial Purchasers relating to the issuance and sale to the Initial Purchasers of $850,000,000 aggregate principal amount of the Issuer’s 6.375% Senior Notes due 2021 (the “Notes”). Capitalized terms used herein and not otherwise defined herein shall have the meanings ascribed to such terms in the Purchase Agreement.

1. Representations, Warranties and Agreements. Each of the undersigned hereby represents and warrants to and agrees that it has the requisite right, power and authority to execute, deliver and perform its obligations under this Joinder Agreement and to consummate the transactions contemplated hereby. This Joinder Agreement has been duly authorized, executed and delivered by each of the undersigned.

2. Joinder. Without limiting the generality of the foregoing, each of the undersigned agrees that it will be bound by all covenants, agreements, representations, warranties and acknowledgments attributable to the Company or the Guarantors, as applicable, under the Purchase Agreement, as if each of the undersigned was a party thereto as of the date of the Purchase Agreement.

3. Counterparts. This Joinder Agreement may be signed in one or more counterparts (which may be delivered in original form or facsimile or “pdf” file thereof), each of which shall constitute an original when so executed and all of which together shall constitute one and the same agreement.

4. Amendments. No amendment or waiver of any provision of this Joinder Agreement, nor any consent or approval to any departure therefrom, shall in any event be effective unless the same shall be in writing and signed by the parties thereto.

5. Headings. The section headings used herein are for convenience only and shall not affect the construction hereof.

6. APPLICABLE LAW. THE VALIDITY AND INTERPRETATION OF THIS JOINDER AGREEMENT, THE TERMS AND CONDITIONS SET FORTH HEREIN AND ANY CLAIM, CONTROVERSY OR DISPUTE ARISING UNDER OR RELATED TO THIS JOINDER AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

IN WITNESS WHEREOF, each of the undersigned has caused this Joinder Agreement to be duly executed and delivered in New York, New York, by its proper and duly authorized officer as of the date set forth above.

[Signature Page to Purchase Agreement Joinder Agreement]

[Signature Page to Purchase Agreement Joinder Agreement]

[Signature Page to Purchase Agreement Joinder Agreement]

[Signature Page to Purchase Agreement Joinder Agreement]