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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

(Amendment No. 1)

For the quarterly period ended September 30, 2011

OR

For the transition period from            to            

Commission file number 000-54480

ALST CASINO HOLDCO, LLC

(Exact name of registrant as specified in its charter)

2711 Centerville Road, Suite 400

Wilmington, DE

(Address of principal executive offices)

19808

(Zip Code)

(302) 636-5401

Registrant’s telephone number, including area code

N/A

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ¨    No  x

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definition of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act:

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

As of December 14, 2011, 432,004 of the registrant’s common units were outstanding.

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ALST CASINO HOLDCO, LLC

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EXPLANATORY NOTE

This Amendment No. 1 (the “Amendment”) to the Quarterly Report on Form 10-Q of ALST Casino Holdco, LLC amends the registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2011 that was filed with the Securities and Exchange Commission on December 15, 2011 (the “Original 10-Q”). This Amendment does not reflect a change in the results of operations of the registrant or in any information in the Original 10-Q other than to furnish Exhibit 101 to the Original 10-Q, which contains XBRL Interactive Data Files required to be submitted and posted pursuant to Rule 405 of Regulation S-T. This Amendment does not reflect events occurring after the filing of the Original 10-Q or modify or update the disclosure contained therein in any way other than as required to reflect the amendment discussed above. Pursuant to Rule 12b-15 promulgated under the Securities Exchange Act of 1934, as amended, the complete text of Exhibit 101 of the Original 10-Q in its entirety is attached to this Amendment.

Item  6. Exhibits

No. 31.1*—Certification pursuant to Section 302 of the Sarbanes- Oxley Act of 2002.

No. 31.2*—Certification pursuant to Section 302 of the Sarbanes- Oxley Act of 2002.

No. 32.1*—Certification pursuant to Section 906 of the Sarbanes- Oxley Act of 2002.

No. 32.2*—Certification pursuant to Section 906 of the Sarbanes- Oxley Act of 2002.

No. 99.1*—Aliante Gaming, LLC Unaudited Interim Financial Statements – September 30, 2011.

No. 101 INS**    XBRL Instance Document

No. 101 SCH**   XBRL Schema Document

No. 101 CAL**   XBRL Calculation Linkbase Document

No. 101 LAB**   XBRL Labels Linkbase Document

No. 101 PRE**   XBRL Presentation Linkbase Document

No. 101 DEF**   XBRL Definition Linkbase Document

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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