Brandcliff House is affiliated with Mind Sports South Africa (MSSA) and competes in the South African Inter-School Online League. The school first started competing in inter-school matches in 2015. With the growth of competitive online gaming, the number of students that play online games has also increased.
In past years, Brandcliff House has fielded teams competing in games on both console and PC platforms. The school has had strong teams playing DOTA 2, League of Legends, StarCraft 2, Call of Duty, FIFA, and Counter Strike (CS:GO).