Increasing competition for Steam is beneficial for the entire gaming industry, according to one expert.
Valve's co-founder Gabe Newell has welcomed the arrival of Epic Games Store, saying it ought to prove to be a good thing for the gaming industry in the long-term.
Gabe told Edge magazine: "Competition in game stores is awesome for everybody. It keeps us honest, it keeps everybody else honest.
"But it's ugly in the short term. You're like, 'Argh, they're yelling, they're making us look bad' - but in the long term, everybody benefits from the discipline and the thoughtfulness it means you have to have about your business by having people come in and challenge you."
Value launched Steam - which is a video game digital distribution service - back in 2003.
And Gabe has insisted he'll always welcome competition.
He said: "We get a lot more freaked out not by competition, but by people trying to preclude competition.
"If you ask us which is scarier, it's people falling in love with Apple's model of controlling everything and having faceless bureaucrats who get to keep your product from entering the market if they don't want it to, or designing a store in a way that minimises software's value-add to experience and stuff like that."