

I was a tech journalist in the early 00’s and I remember writing about that story or one like that.
A similar thing happened with Microsoft, who either delivered or was served the full documentation of some office format printed out. It’s a pretty popular form of malicious compliance, also paying people in bags of coins.
Quake 2 has been GPL and had Linux versions since forever, even official ones from id.
I assume this remaster uses the same engine. Maybe they used stuff from contributors/forks, that’s why they kept it open.