Sentinel Rock Oil Inc. and Sundance Energy Corporation Update

CALGARY, ALBERTA--(Marketwire - Jan. 26, 2011) -

Not For Distribution To U.S. News Wire Services Or Dissemination In The United States.

Sentinel Rock Oil Inc. ("Sentinel Rock") (TSX VENTURE:SNT). Sentinel Rock entered into a letter of intent dated December 22, 2010 with Sundance Energy Corporation ("Sundance Energy" or "the Company") wherein the two companies intend to complete a business combination (the "Proposed Transaction"). The Proposed Transaction was announced in a news release on January 17, 2011. Sentinel Rock and Sundance Energy have entered into an agreement to extend the completion date for due diligence and the date for entering into a formal agreement until Friday, February 4, 2011. In addition, Sentinel Rock is pleased to advise that its application to the TSX Venture Exchange for exemption from sponsorship requirements in connection with the Proposed Transaction has been granted effective today. Accordingly, trading in the shares of Sentinel Rock will re-commence on or about Thursday, January 27, 2011.

READER ADVISORY

Completion of the Proposed Transaction is subject to a number of conditions, including but not limited to, final acceptance by the TSX Venture Exchange and, if applicable pursuant to the requirements of the Exchange, shareholder approval. Where applicable, the Proposed Transaction cannot close until the required shareholder approval is obtained. There can be no assurance that the Proposed Transaction will be completed as proposed or at all.

Investors are cautioned that, except as disclosed in the filing statement or management information circular to be prepared in connection with the Proposed Transaction, any information released or received with respect to the Proposed Transaction may not be accurate or complete and should not be relied upon. Trading in the securities of Sentinel Rock should be considered highly speculative.

Forward-Looking Statements

This news release contains forward-looking statements and forward-looking information within the meaning of applicable securities laws. The use of any of the words "expect", "anticipate", "continue", "estimate", "objective", "ongoing", "may", "will", "project", "should", "believe", "plans", "intends" and similar expressions are intended to identify forward-looking information or statements. More particularly and without limitation, this news release contains forward looking statements and information concerning Sentinel Rock's future operations and prospects. The forward-looking statements and information are based on certain key expectations and assumptions made by Sentinel Rock, including expectations and assumptions concerning equipment and crew availability and financial capability. Although Sentinel Rock believes that the expectations and assumptions on which such forward-looking statements and information are based are reasonable, undue reliance should not be placed on the forward looking statements and information because Sentinel Rock can give no assurance that they will prove to be correct. By its nature, such forward-looking information is subject to various risks and uncertainties, which could cause Sentinel Rock's actual results and experience to differ materially from the anticipated results or expectations expressed. These risks and uncertainties, include, but are not limited to reservoir performance, labour, equipment and material costs, access to capital markets, interest and currency exchange rates, political and economic conditions. Readers are cautioned not to place undue reliance on this forward-looking information, which is given as of the date it is expressed in this news release or otherwise, and to not use future-oriented information or financial outlooks for anything other than their intended purpose. Sentinel Rock undertakes no obligation to update publicly or revise any forward-looking information, whether as a result of new information, future events or otherwise, except as required by law.

The TSX Venture Exchange Inc. has in no way passed upon the merits of the Proposed Transaction and has neither approved nor disapproved of the contents of this press release.

The securities of the Corporation have not been, nor will be, registered under the United States Securities Act of 1933, as amended, and may not be offered or sold within the United States or to, or for the account or benefit of, U.S. persons absent U.S. registration or an applicable exemption from U.S. registration requirements. This release does not constitute an offer for sale of securities in the United States.