Wolfire Games' argument centers on Valve's revenue split and the ubiquitous nature of the Steam marketplace.
According to new details slipped into Steam's code, Valve has been working on a Switch-like portable gaming PC.
The move comes after years of avoiding Valve's digital storefront.
Over the last year or so, Valve has been making attempts to tackle the ever-present specter of discoverability.
The event looks to fill the hole left by E3's cancellation. Indies tell GameDaily that the Steam Game Festival is now more important than ever amid the pandemic.
The practice is "irresponsible," says Nicholas Laborde of Raconteur Games.