Linux gaming still has plenty of rough edges, but we've come a long way from the days when installing Linux meant accepting that most commercial PC games simply weren't coming with you. More than a decade before Valve brought Steam to Linux, a small company in Tustin, California, tried to change that in the expensive way. Linux had users who wanted commercial PC games, but each major Windows release needed someone to justify building a separate Linux version. Loki spent three years trying to create a commercial Linux gaming market, and right up to the end it was still shipping the boxed Linux games on which the whole experiment depended. Compatibility still varies, and anti-cheat remains one of Proton's biggest Linux gaming problems.