> http://en.wikipedia.org/wiki/Wolfenstein:_Enemy_Territory

That's Enemy Territory, not its predecessor RtCW. And from your link:

"The actual game engine is still closed source as of late 2009"

It's even in your own quote: "not the game engine". So the part that got open sourced does not suffice to port the game but only to create mods for platforms that already have a proprietary compile of the game engine.

Also, see that discussion where you took part back then and where Golem tried to enlighten you regarding your misconception of the matter.

https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=6293&forum=32