> Steam just suffered what may be the biggest leak in video game history

Might be bigger in terms of bytes, but https://en.wikipedia.org/wiki/Nintendo_data_leak seemed like a bigger deal.

More:

https://www.polygon.com/steam-leak-valve-portal-2-beta-half-...

https://www.eurogamer.net/valve-steam2-leak-12tb-portal-2-ha...

To save people a click, the data is from 2003 to 2013, not more recent.