With the Command & Conquer Remastered Collection releasing next month for Windows, EA had a bit of an announcement to make today in regards to open source.
Posting on Reddit as well as the Steam page, EA announced that both Tiberian Dawn and Red Alert will see their data being opened up. They will release "TiberianDawn.dll and RedAlert.dll and their corresponding source code under the GPL version 3.0 license". This is being done, they say, as a result of a collaboration between them and the community and they went with the GPL to "ensure compatibility with projects like CnCNet and Open RA".
This is quite surprising, I will admit. They already released the originals free back in 2010, during the 15th anniversary so this sounds like a nice step further. If it helps other projects reimplement more of them, then that's a win-win for everyone. Hopefully they will eventually do the same for more.
Although the Remastered Collection won't officially support Linux, do check out OpenRA if you haven't before, which supports the classic Westwood strategy games in a free and open source game engine. It's not fully the same, due to plenty of modernization but it's close and has support for a lot of the single-player campaigns, AI battles and cross-platform online play.
Feels like we're currently living in upside-down land. We have EA doing actual open source under the GPL, and on the other side we have id Software who used to release their game engines as open source now putting invasive anti-cheat into them like with DOOM Eternal.