[emperor_]

Team Comtress 2 is a fork of an older version of Team Fortress 2, with a community development team fixing bugs, improving performance, and adding quality of life features, with the goal of having those changes pulled upstream by Valve to the modern game.

[cschep]

Is there a precedent of something like this ever happening? Seems like an enormous leap, but who doesn't love an underdog? :)

[ansible]

Seeing as how they are basing their work on a leaked (stolen) version of the TF2 source code from Valve, I don't see this project even existing for very long, much less contributing anything back to Valve.

[rasz]

There actually is https://www.eurogamer.net/articles/2011-02-21-the-boy-who-st... Dude got 2 years probation, Nowadays he steals source code for the Chinese I guess (tencent).