More than $1.4 billion has been spent on ID@Xbox games to date, according to the programme's European lead Agostino Simonetta.
Simonetta gave the new figure as part of a talk at the GamesIndustry.biz Investment Summit Online. Player spending stood at $1 billion in July 2018, so the additional $400 million has been spent in less than two years.
ID@Xbox was first announced in August 2013, and the programme has now grown to encompass 3,400 studios across 64 countries -- at least one game from every continent except Antarctica has been released, Simonetta noted.
Microsoft is aware of around 1,800 ID@Xbox games in some stage of development.
"Obviously, we are not a publisher -- we are the platform," Simonetta said. "We don't know how many are coming, or when they will come, but there's a lot of activity."
For reference, more than 1,300 games have been released through ID@Xbox in the seven years since it was first announced.
You can see Simonetta's full presentation in the video below, and the rest of the Investment Summit talks on the GamesIndustry.biz YouTube channel.