Nevada Gaming Commission Approves Acquisition of Ameristar Casinos by Pinnacle Entertainment

Nevada Gaming Commission Approves Acquisition of Ameristar Casinos by Pinnacle
Entertainment

LAS VEGAS, May 17, 2013 (GLOBE NEWSWIRE) -- Pinnacle Entertainment announced
today that the Nevada Gaming Commission unanimously approved the Company's
proposed acquisition of Ameristar Casinos.

Completion of the transaction remains subject to the expiration or termination
of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act
of 1976, customary closing conditions and receipt of required regulatory
approvals.

"We are pleased to reach this first milestone in the regulatory approval
process for our proposed acquisition of Ameristar Casinos, and thank the
Nevada Gaming Control Board and Nevada Gaming Commission for acting diligently
and expeditiously in addressing the transaction. We continue to work
cooperatively with the Federal Trade Commission and the remaining state gaming
regulatory agencies to obtain the necessary approvals to complete the
transaction.We continue to expect to close the transaction in the second or
third quarter of this year," said Anthony Sanfilippo, President and CEO of
Pinnacle Entertainment.

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 an approximate 24% equity stake in Asian Coast
Development (Canada) Ltd., 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 December20, 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; (b) the ability and
timing to obtain required regulatory approvals (including approval from gaming
regulators other than 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, including expiration of the
waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976;
(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
Forms 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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