The Epic Games Store's controversial strategy of securing exclusive deals for PC games will swiftly end —but only if Steam commits to an 88 percent revenue share for developers, said Epic Games CEO Tim Sweeney.

On Wednesday, Sweeney dangled the proposal in a tweet thread sent amid the company's ongoing competition with Valve's Steam platform for distribution of the PC games market. To pull customers to the Epic Games Store, the company has been striking exclusivity deals for titles such as Metro Exodus and the upcoming Borderlands 3, but at the expense of gamers who'd prefer to play them on Steam.

However, Sweeney said the exclusivity practices would stop if Steam overhauled its business model. "If Steam committed to a permanent 88 percent revenue share for all developers and publishers without major strings attached, Epic would hastily organize a retreat from exclusives," he said in a tweet.

If Steam committed to a permanent 88% revenue share for all developers and publishers without major strings attached, Epic would hastily organize a retreat from exclusives (while honoring our partner commitments) and consider putting our own games on Steam. — Tim Sweeney (@TimSweeneyEpic) April 25, 2019

Unlike Steam, which largely offers a 70/30 revenue split to developers, the Epic Games Store has been offering a more lucrative 88/12 split, giving PC game makers more incentive to expand to the platform. Steam's 70/30 split is also why Epic Games never brought its own Fortnite game over to the store. But that could change if Steam committed to the 88 revenue share, Sweeney said.

"Such a move would be a glorious moment in the history of PC gaming, and would have a sweeping impact on other platforms for generations to come," he said in a separate tweet.

So far, Valve hasn't commented on Sweeney's proposal. But it's doubtful the company will change its business model over a few tweets. Sweeney also offered caveats with his proposal, which essentially calls for open platforms that are free to interoperate with each other.

In the meantime, expect the Epic Games Store to continue to strike exclusivity deals. Last month, Ubisoft announced it would pull the strategy title Anno 1800 from Steam after April 16th and instead offer it solely on the Epic Games Store.