Mattel163 Limited is a 50–50 joint venture between American toy manufacturing and entertainment company Mattel and Chinese Internet company NetEase, aimed for developing and publishing online video games based on the former's intellectual properties.

[2] Its headquarters are located in both Hangzhou, China and El Segundo, California.

At near end of 2017, Mattel and NetEase partnered to create a new development studio.

Mattel163 CEO Amy Huang-Lee says:[1] It was a very good match for both companies.

We started discussing everything in late 2016 and we spent most of 2017 working out the details.