Safe Harbor/Non-GAAP Financial Disclosures 2 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 and Ameristar’s current expectations and are subject to uncertainty and changes in circumstances. These forward-looking statements include, among others, statements regarding the expected synergies and benefits of a potential combination of Pinnacle and Ameristar, including the expected accretive effect of the merger on Pinnacle’s financial results and profile (e.g., free cash flow, earnings per share and Consolidated Adjusted EBITDA); the anticipated benefits of geographic diversity that would result from the merger and the expected results of Ameristar’s gaming properties; expectations about future business plans, prospective performance and opportunities; required regulatory approvals; the expected timing of the completion of the transaction; and the anticipated financing of the transaction. These forward-looking statements may be identified by the use of words such as “expect,” “anticipate,” “believe,” “estimate,” “potential,” “should”, “will” or similar words intended to identify information that is not historical in nature. The inclusion of such statements should not be regarded as a representation that such plans, estimates or expectations will be achieved. 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; (b) the ability and timing to obtain required regulatory approvals (including approval from gaming regulators) and satisfy or waive other closing conditions; (c) the ability to obtain the approval of Ameristar’s stockholders; (d) 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; (e) Pinnacle’s ability to realize the synergies contemplated by a potential transaction; (f) Pinnacle’s ability to promptly and effectively integrate the business of Pinnacle and Ameristar; (g) 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; (h) uncertainties in the global economy and credit markets and its potential impact on Pinnacle’s ability to finance the transaction; (i) the outcome of any legal proceedings that may be instituted in connection with the transaction; (j) the ability to retain certain key employees of Ameristar; (k) that there may be a material adverse change affecting Pinnacle or Ameristar, or the respective businesses of Pinnacle or Ameristar may suffer as a result of uncertainty surrounding the transaction; (l) Pinnacle’s ability to obtain financing on the terms expected, or at all; and (m) the risk factors disclosed in Pinnacle’s most recent Annual Report on Form 10-K/A, which Pinnacle filed with the Securities and Exchange Commission on May 16, 2012 and the risk factors disclosed in Ameristar’s most recent Annual Report on Form 10-K, which Ameristar filed with the Securities and Exchange Commission on February 28, 2012,3 and in all reports on Forms 10-K, 10-Q and 8-K filed with the Securities and Exchange Commission by Pinnacle and Ameristar subsequent to the filing of their respective Form 10-Ks for the year ended December 31, 2011. Forward-looking statements reflect Pinnacle’s and Ameristar’s management’s analysis as of the date of this release. Pinnacle and Ameristar do 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. Non-GAAP Financial Measures As used in this presentation, Consolidated Adjusted EBITDA, Consolidated Adjusted EBITDA margin, Free Cash Flow and Adjusted EBITDA are non-GAAP measurements. Pinnacle defines Consolidated Adjusted EBITDA as earnings before interest income and expense, income taxes, depreciation, amortization, pre-opening and development expenses, non-cash share-based compensation, asset impairment costs, write-downs, reserves, recoveries, corporate-level litigation settlement costs, gain (loss) on sale of certain assets, loss on early extinguishment of debt, gain (loss) on sale of equity security investments, minority interest and discontinued operations. Pinnacle defines Consolidated Adjusted EBITDA margin as Consolidated Adjusted EBITDA divided by revenues. Pinnacle defines Free Cash Flow as Consolidated Adjusted EBITDA less maintenance capital expenditures, cash taxes and cash interest expense. Ameristar defines Adjusted EBITDA as earnings before interest, taxes, depreciation, amortization, other non-operating income and expenses, stock-based compensation, deferred compensation plan expense, non-operational professional fees and river flooding expenses and reimbursements. As shown below, the Combined Adjusted EBITDA is shown on a combined basis of Pinnacle’s Consolidated Adjusted EBITDA and Ameristar’s Adjusted EBITDA for the period ended September 30, 2012, taking into account synergies Pinnacle expects to achieve. | 
