Exhibit 8.1

Principal Subsidiaries and Consolidated Variable Interest Entities of the Registrant

Principal Subsidiaries:

• Changyou.com (HK) Limited, incorporated in Hong Kong.

• Beijing AmazGame Age Internet Technology Co., Ltd., incorporated in the PRC.

• Shanghai Jingmao Culture Communication Co., Ltd, incorporated in the PRC.

• Beijing Changyou Gamespace Software Technology Co., Ltd., incorporated in the PRC.

• Beijing Yang Fan Jing He Information Consulting Co., Ltd, incorporated in the PRC.

• Beijing Changyou Jingmao Film & Culture Communication Co., Ltd., incorporated in the PRC.

• 7Road.com Limited, incorporated in the Cayman Islands.

• 7Road.com HK Limited, incorporated in Hong Kong.

• Changyou.com Webgames (HK) Limited, incorporated in Hong Kong.

• Shenzhen Brilliant Imagination Technologies Co., Ltd., incorporated in the PRC.

• Beijing Changyou Chuangxiang Software Technology Co.,Ltd., incorporated in the PRC.

Principal Consolidated Variable Interest Entities:

• Shanghai ICE Information Technology Co., Ltd., incorporated in the PRC.

• Beijing Gamease Age Digital Technology Co., Ltd., incorporated in the PRC.

• Beijing Guanyou Gamespace Digital Technology Co., Ltd., incorporated in the PRC.