FIRST AMENDMENTTO CREDIT AGREEMENT

Exhibit 10.20

Execution Copy

FIRST AMENDMENT TO CREDIT AGREEMENT

THIS FIRST AMENDMENT (this “Amendment”) dated as of December 27, 2005 is entered into by and among TEXAS ROADHOUSE, INC., as Borrower (the “Borrower”), the lenders from time to time party to the Credit Agreement referred to below (the “Lenders”) and BANK OF AMERICA, N.A., as Administrative Agent (the “Administrative Agent”).

Statement of Purpose

Pursuant to that certain Credit Agreement dated as of October 8, 2004 (as amended, restated, supplemented or otherwise modified, the “Credit Agreement”) by and among the Borrower, the Lenders and the Administrative Agent, the Lenders have agreed to make, and have made, certain extensions of credit to the Borrower.

The Borrower has requested that the Lenders amend the Credit Agreement as provided herein. Subject to the terms and conditions set forth herein, the Lenders are willing to consent to such amendment.

NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged by the parties hereto, such parties hereby agree as follows:

Section 1.                                          Definitions. All capitalized terms used and not defined herein shall have the meanings assigned thereto in the Credit Agreement.

Section 2.                                          Amendments.

(a)                                  Section 7.01 of the Credit Agreement (“Liens”) is hereby amended by adding the following subsection (l):

“(l)                               Liens existing on any assets acquired pursuant to any Permitted Acquisition under Section 7.02(g) which (i) were not created in contemplation of or in connection with such Permitted Acquisition and (ii) do not extend to or cover any other property or assets of Borrower or any Subsidiary, in each case, so long as any Indebtedness related to any such Liens are permitted under Section 7.03(k).”

(b)                                 Section 7.02(g)(10) of the Credit Agreement (“Investments”) is hereby deleted in its entirety and the following is hereby substituted in lieu thereof:

“(10) the Borrower shall have obtained the prior written consent of the Administrative Agent and the Required Lenders prior to the consummation of such acquisition if (i) the aggregate purchase price of all the acquisitions (including, without limitation, all cash payments and other obligations assumed or earn out payments) consummated during any Fiscal Year (including, without limitation, such acquisition) exceeds (A) $50,000,000 in Equity Interests of any Loan Party or (B) $25,000,000 in cash or (ii) the aggregate purchase price of all the acquisitions (including, without limitation, all

cash payments and other obligations assumed or earn out payments) consummated during the term of this Agreement (including, without limitation, such acquisition) exceeds (A)  $100,000,000 in Equity Interests of any Loan Party or (B) $50,000,000 in cash.”

(c)                                  Section 7.03 of the Credit Agreement (“Indebtedness”) is hereby amended by adding the following subsection (k):

“(k)                            Indebtedness of a Person existing at the time such Person became a Subsidiary pursuant to any Permitted Acquisition under Section 7.02(g) or Indebtedness of the Borrower or any Subsidiary in connection with assets acquired pursuant to any Permitted Acquisition under Section 7.02(g), in each case, to the extent such Indebtedness was not incurred in connection with or in contemplation of Permitted Acquisition, not to exceed in the aggregate at any time outstanding $30,000,000.”

(d)                                 Section 7.16 of the Credit Agreement (“Capital Expenditures”) is hereby amended by deleting such Section in its entirety and hereby substituting the following new Section in lieu thereof:

“7.16                  Capital Expenditures.                            Make or become legally obligated to make, during any period set forth below, any Capital Expenditures (other than Capital Expenditures in the form of Permitted Acquisitions permitted pursuant to Section 7.02(g)) in respect of the purchase or other acquisition of any fixed or Capital Assets (excluding normal replacements and maintenance which are properly charged to current operations), except for Capital Expenditures in the ordinary course of business not exceeding in the aggregate for the Borrower and its Subsidiaries the amounts set forth below opposite such period:

Section 3.                                          Effectiveness. This Amendment shall become effective when, and only when, the Administrative Agent shall have received satisfactory evidence that this Amendment has

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been duly executed and delivered by the Borrower, the Administrative Agent and the Required Lenders, in form and substance satisfactory to the Administrative Agent.

Section 4.                                          Limited Effect. Except as expressly provided in this Amendment, the Credit Agreement and each other Loan Document shall continue to be, and shall remain, in full force and effect and this Amendment shall not be deemed or otherwise construed (a) to be a waiver of, or consent to or a modification or amendment of, any other term or condition of the Credit Agreement or any other Loan Document, (b) to prejudice any other right or remedies that the Administrative Agent or the Lenders, or any of them, may now have or may have in the future under or in connection with the Credit Agreement or the Loan Documents, as such documents may be amended, restated or otherwise modified from time to time, or (c) to be a commitment or any other undertaking or expression of any willingness to engage in any further discussion with the Borrower or any other person, firm or corporation with respect to any waiver, amendment, modification or any other change to the Credit Agreement or the Loan Documents or any rights or remedies arising in favor of the Lenders or the Administrative Agent, or any of them, under or with respect to any such documents. References in the Credit Agreement (including references to such Credit Agreement as amended hereby) to “this Agreement” (and indirect references such as “hereunder”, “hereby”, “herein”, and “hereof”) and in any Loan Document to the Credit Agreement shall be deemed to be references to the Credit Agreement as amended hereby.

Section 5.                                          Representations and Warranties/No Default. By its execution hereof, and after giving effect to this Amendment, the Borrower hereby certifies that:

(a)                                  each of the representations and warranties set forth in the Credit Agreement and the other Loan Documents is true and correct as of the date hereof as if fully set forth herein (other than representations and warranties which speak as of a specific date pursuant to the Credit Agreement, which representations and warranties shall have been true and correct as of such specific dates) and that as of the date hereof and after giving effect to this Amendment, no Default or Event of Default has occurred and is continuing, and

(b)                                 the execution, delivery and performance of this Amendment have been authorized by all requisite corporate action on the part of the Borrower.

Section 6.                                          Expenses. The Borrower shall pay all reasonable out-of-pocket costs and expenses of the Administrative Agent in connection with the preparation, execution and delivery of this Amendment, including, without limitation, the reasonable fees and disbursements of counsel for the Administrative Agent (including, without limitation, all fees and expenses of Kennedy Covington Lobdell & Hickman, L.L.P., as legal counsel to the Administrative Agent).

Section 7.                                          Governing Law. This Amendment shall be governed by and construed in accordance with the laws of the State of North Carolina.

Section 8.                                          Counterparts. This Amendment may be executed in separate counterparts, each of which when executed and delivered is an original but all of which taken together constitute one and the same instrument.

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Section 9                                             Fax Transmission. A facsimile, telecopy or other reproduction of this Amendment may be executed by one or more parties hereto, and an executed copy of this Amendment may be delivered by one or more parties hereto by facsimile or similar instantaneous electronic transmission device pursuant to which the signature of or on behalf of such party can be seen, and such execution and delivery shall be considered valid, binding and effective for all purposes. At the request of any party hereto, all parties hereto agree to execute an original of this Amendment as well as any facsimile, telecopy or other reproduction hereof.

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IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed by their respective officers thereunto duly authorized, as of the date first above written.

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