Sonnori (손노리) is a South Korean company that was established in July, 1992 as an Indie game development team. After belonging as a team of Softry (1994) and Phantagram (1997). The company became independent in February 1998. The company became a subsidiary of CJ Games in 2011 and dissolved shortly after.

Sonnori are best known for their work on the Astonishia Story games and White Day. Their last game was Astonishia Story Online.

Later, It's former CEO, Lee Won Sool has re-established 'Sonnori' and registered it in the registration of corporation. And used ROI Games as official name.

On July 14th 2017, ROI Games changed its name back to Sonnori.