UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 23, 2010

DDi Corp.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (714) 688-7200

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On September 23, 2010, DDi Corp. (the “Company”) entered into a Credit Agreement (the “Credit Agreement”) among the following subsidiaries of the Company as U.S. borrowers: DDi Global Corp., DDi Sales Corp., DDi North Jackson Corp., DDi Milpitas Corp., DDi Denver Corp., and DDi Cleveland Corp. (the “U.S. Borrowers”), DDi Toronto Corp., as Canadian Borrower (the “Canadian Borrower”), the Company and certain other subsidiaries of the Company as guarantors, the lenders from time to time party thereto, JPMorgan Chase Bank, N.A., as Administrative Agent and U.S. Lender, and JPMorgan Chase Bank, N.A., Toronto Branch, as Canadian Administrative Agent and Canadian Lender (the “Credit Agreement”).

The Credit Agreement provides for a revolving credit facility in an aggregate principal amount of $25.0 million, with a Canadian sublimit of $10 million, none of which was drawn on the date of the Credit Agreement. The revolving credit facility has an accordion provision that allows the Company to increase the size to $40 million under certain circumstances. Availability under the revolving credit facility is based on various liquidity and borrowing base tests including the Company’s eligible accounts receivable and inventories. The maturity date for the revolving credit facility is 3 years from the date of the Credit Agreement.

The interest rates payable under the Credit Agreement will depend on the type of loan and are based on published rates plus an applicable margin. The initial applicable rates for loans made under the Credit Agreement are: (i) 3.25% for any CB Floating Rate loan; (ii) 3.79% for any Eurodollar loan; (iii) 3.50% for any Canadian Prime Rate loan; and (iv) 4.23% for any CDOR Rate loan. A commitment fee of 0.5% accrues on unused amounts of the commitments under the revolving credit facility.

The Credit Agreement contains customary representations and warranties and covenants, including, without limitation, the following covenants: maintenance of a minimum fixed charge coverage ratio and a maximum capital expenditures covenant. The Credit Agreement also includes customary events of default, in certain cases subject to reasonable and customary periods to cure, including but not limited to: failure to make payments when due, breach of covenants, breach of representations and warranties, insolvency proceedings, certain judgments and attachments and any change of control.

The Credit Agreement contains certain covenants that, among other things, restrict, subject to certain exceptions, the ability of the Company and its subsidiaries to: (i) incur indebtedness; (ii) create liens on assets; (iii) engage in mergers or consolidations; (iv) engage in certain dispositions of assets; (v) make investments, loans, guarantees or advances; (vi) pay dividends and distributions or repurchase capital stock; (vii) enter into sale and leaseback transactions; (viii) engage in certain transactions with affiliates; and (ix) change the nature of the Company’s business. In addition, the Credit Agreement requires the Company to maintain the following financial covenants: (i) a minimum fixed charge coverage ratio, and (ii) a maximum capital expenditure limitation.

All obligations under the Credit Agreement are guaranteed by the Company and each of the Company’s domestic wholly-owned subsidiaries (such subsidiary guarantors, the “U.S. Subsidiary Guarantors”). All obligations under the Credit Agreement, and the guarantees of those obligations, are secured by (i) all of the capital stock of each of the U.S. Borrowers and the U.S. Subsidiary Guarantors, except that with respect to DDi Toronto Corp. such security interest is limited to 65% of its capital stock, and (ii) substantially all of the tangible and intangible assets of the Company other than real property and equipment, pursuant to a Pledge and Security Agreement dated September 23, 2010 (the “U.S. Security Agreement”). The obligations of the Canadian Borrower are also secured by substantially all of the tangible and intangible assets of the Canadian Borrower pursuant to a Pledge and Security Agreement dated September 23, 2010 (the “Canadian Security Agreement”).

The foregoing descriptions of the Credit Agreement, the U.S. Security Agreement and the Canadian Security Agreement are qualified in their entirety by the terms of each such agreements, copies of which are filed as Exhibits 10.1, 10.2 and 10.3, respectively, to this Current Report and incorporated herein by reference.

The information set forth in Item 1.01 is incorporated herein by reference.

SIGNATURES

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

Exhibit Index