Microsoft Corp. is facing a proposed class-action lawsuit alleging anticompetitive behavior in collaboration with Valve Corp., the operator of the Steam gaming platform. The lawsuit, filed in the U.S. District Court for the Western District of Washington, claims that the two companies engaged in a pricing agreement that stifled competition in the PC game distribution market. Plaintiffs assert that this agreement maintained uniform pricing for PC games across both platforms, limiting competitive pressure and harming consumers. The lawsuit also alleges that the arrangement discouraged competition and reduced incentives for improving game quality and offerings. The plaintiffs seek class-action status to represent all gamers who purchased PC games through these platforms. Neither Microsoft nor Valve has publicly addressed the allegations at the time of the lawsuit's filing.