Hagens Berman Sobol Shapiro has filed a class action lawsuit accusing Valve Corp. of maintaining an unlawful monopoly on the PC video game distribution market and in-game payment processing.

Valve, best known for its PC gaming platform Steam and the Half-Life video game series, is accused of engaging in an “anti-competitive scheme” by imposing market-wide floor prices and forcing consumers to pay inflated prices for popular game titles.