UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

For the month of July 2017

Commission File Number: 001-34271

CHANGYOU.COM LIMITED

(Exact name of registrant as specified in its charter)

Changyou Creative Industrial Park

65 Bajiao East Road, Shijingshan District

Beijing 100043

People’s Republic of China

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F  ☑    Form 40-F  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ☐    No  ☑

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ☐    No  ☑

Press Releases

On July 31, 2017, the registrant announced its unaudited financial results for the second quarter ended June 30, 2017. The registrant also announced that Ms. Jasmine Zhou has submitted to the registrant’s board of directors (the “Board”) her resignation as the registrant’s Chief Financial Officer, for personal reasons. Ms. Zhou has agreed, at the Board’s request, that she will remain in her current position for a suitable period, in order to allow the registrant’s management and the Board to identify a suitable replacement for Ms. Zhou. A copy of the press release issued by the registrant regarding the foregoing is filed herewith as Exhibit 99.1 and is incorporated herein by reference.

Safe Harbor Statement

This report on 6-K contains forward-looking statements. Statements that are not historical facts, including statements about the registrant’s beliefs and expectations, are forward-looking statements. These statements are based on current plans, estimates and projections, and therefore you should not place undue reliance on them.

Forward-looking statements involve inherent risks and uncertainties. The registrant cautions you that a number of important factors could cause actual results to differ materially from those contained in any forward-looking statement.

Potential risks and uncertainties include, but are not limited to, continuing volatility in global financial and credit markets and its potential impact on the Chinese economy, exchange rate fluctuations in general and possible continued valuation of the RMB in particular, including their potential impact on the Chinese economy and on the registrant’s reported U.S. dollar results; slowing growth in the Chinese economy, the uncertain regulatory landscape in the People’s Republic of China, fluctuations in the registrant’s quarterly operating results, the possibility that the registrant will be unable to develop a series of successful games for mobile platforms or successfully monetize mobile games it develops or acquires, the possibility that the registrant’s margins will decline as a result of the need for revenue-sharing with mobile game platform operators, and the registrant’s reliance on TLBB as its major revenue source. Further information regarding these and other risks is included in the registrant’s Annual Report on Form 20-F filed on February 27, 2017, and other filings with the Securities and Exchange Commission.

Exhibits.

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 hereunto duly authorized.

Date: July 31, 2017

EXHIBIT INDEX