Exhibit 15.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-161727) of Changyou.com Limited of our report dated February 28, 2012 relating to the consolidated financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 20-F.

/s/ PricewaterhouseCoopers Zhong Tian CPAs Limited Company

PricewaterhouseCoopers Zhong Tian CPAs Limited Company

Beijing, People’s Republic of China

February 28, 2012

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