1460
From Steam's self-published stats.
Baldur's Gate 3 could not be preloaded and weighed in at 125 gigabytes on disk, so when the game left Early Access at 11am US Eastern yesterday, Steam's bandwidth utilization shot up 8x over a span of 30 minutes. I know personally, I saw my download hit over 600 Mbps across a 1 Gbps fiber connection.
Kudos to the system engineers at Valve. It is mind-boggling that they have built infrastructure that robust.
With how popular the Divinity Original Sin series is I would be surprised if the game wasn't as popular as it is. Larian knows how to make a fucking great crpg.
I still think it's impressive and unexpected though. Divinity never broke 100k players even which I assume is the second highest cRPG player count.
For a game to go over 5x bigger on Steam than any other game of its genre? Thats impressive.