Iowa Racing and Gaming Commission Approves Acquisition of Ameristar Casinos by Pinnacle Entertainment

Iowa Racing and Gaming Commission Approves Acquisition of Ameristar Casinos by
Pinnacle Entertainment

LAS VEGAS, June 6, 2013 (GLOBE NEWSWIRE) -- Pinnacle Entertainment announced
today that the Iowa Racing and Gaming Commission unanimously approved the
Company's proposed acquisition of Ameristar Casinos. Completion of the
transaction remains subject to the receipt of additional required regulatory
approvals and customary closing conditions.

"We thank the Iowa Racing and Gaming Commission for diligently and
expeditiously approving our proposed acquisition of Ameristar Casinos, and
look forward to welcoming Ameristar's terrific gaming entertainment property
in Council Bluffs, Iowa into the Pinnacle Entertainment family in the near
future," said Anthony Sanfilippo, Chief Executive Officer of Pinnacle
Entertainment. "With both Iowa and Nevada approvals now behind us, we continue
to work to obtain Federal Trade Commission and remaining state gaming
regulatory agency clearances necessary to complete the transaction. We expect
to close the transaction in the 2013 third quarter," Mr. Sanfilippo continued.

About Pinnacle Entertainment

Pinnacle Entertainment, Inc. owns and operates seven casinos, located in
Louisiana, Missouri, and Indiana, and a racetrack in Ohio. In addition,
Pinnacle is redeveloping River Downs in Cincinnati, Ohio into a gaming
entertainment facility, owns a minority interest in Asian Coast Development
(Canada) Ltd., an international development and real estate company currently
developing Vietnam's first large-scale integrated resort on the Ho Tram Strip,
and holds a majority interest in the racing license owner, as well as a
management contract, for Retama Park Racetrack outside of San Antonio, Texas.

On December 20, 2012, Pinnacle agreed to acquire Ameristar Casinos, Inc. in an
all cash transaction valued at $26.50 per Ameristar share or total
consideration of $2.8 billion including assumed debt. Ameristar owns and
operates casino facilities in St. Charles near St. Louis, Mo.; Kansas City,
Mo.; Council Bluffs, Iowa; Black Hawk, Colo.; Vicksburg, Miss.; East Chicago,
Ind.; and the Jackpot properties in Jackpot, Nev.

Important Information Regarding Forward-Looking Statements

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of
the Private Securities Litigation Reform Act of 1995. These forward-looking
statements are based on Pinnacle's current expectations and are subject to
uncertainty and changes in circumstances. These forward-looking statements
include, among others, statements regarding the completion of the transaction.
There is no assurance that the potential transaction will be consummated, and
there are a number of risks and uncertainties that could cause actual results
to differ materially from the forward-looking statements made herein. These
risks and uncertainties include (a) the timing to consummate a potential
transaction between Pinnacle and Ameristar may be delayed based on
circumstances beyond Pinnacle's control, including the ability of Pinnacle to
come to a resolution with the FTC; (b) the ability and timing to obtain
required regulatory approvals (including approval from gaming regulators other
than Iowa and Nevada) and satisfy or waive other closing conditions; (c) the
possibility that the merger does not close when expected or at all, or that
the companies may be required to modify aspects of the merger to achieve
regulatory approval; (d) the requirement to satisfy closing conditions to the
merger as set forth in the merger agreement; (e) Pinnacle's ability to obtain
financing on the terms expected, or at all; and (f) the risk factors disclosed
in Pinnacle's most recent Annual Report on Form 10-K, which Pinnacle filed
with the Securities and Exchange Commission on March 1, 2013 and in all
reports on Forms 10-K, 10-Q and 8-K filed with the Securities and Exchange
Commission by Pinnacle subsequent to the filing of the Form 10-K for the year
ended December 31, 2012. Forward-looking statements reflect Pinnacle's
analysis as of the date of this press release. Pinnacle does not undertake to
revise these statements to reflect subsequent developments, except as required
under the federal securities laws. Readers are cautioned not to place undue
reliance on any of these forward-looking statements.

CONTACT: Investor Relations
         Vincent J. Zahn, CFA
         Vice President, Finance and Investor Relations
         702/541-7777 or investors@pnkmail.com
        
         Media Relations
         Kerry Andersen
         Director, Public Relations
         337/395-7631 or kandersen@pnkmail.com

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