Sumo Group Plc is a United Kingdom-based holding company that provides end-to-end creative development and co-development services to the video games and entertainment industries. The group offers visual concept design and pre-production, full game development, co-development, user-interface design, engineering, porting services, post-release support, and games-as-a-service solutions across console, PC, handheld, and mobile platforms through its subsidiaries including Sumo Digital, Atomhawk, Auroch Digital, Midoki, and multiple regional studios such as Sumo Sheffield, Sumo Leamington, Sumo India, and PixelAnt Games. It operates studios in the United Kingdom, Europe, India, Canada, and other regions, targeting major publishers and developers worldwide. Sumo Group Plc was formed in December 2017 as the parent of Sumo Digital—founded in 2003—and is headquartered in Sheffield, England; it operates as a subsidiary of Tencent's Sixjoy Hong Kong Limited following a complete acquisition in January 2022. Recent developments include the sale of its publishing division Secret Mode to Emona Capital in March 2025 and the divestiture of The Chinese Room in 2025, alongside a strategic refocus announced in February 2025 on exclusive co-development and service work for partners, the closure of Timbre Games, and workforce reductions of up to 15% in June 2024; earlier, it acquired Midoki in September 2023 and Auroch Digital in September 2021.