etlegacy VS endless-sky

You could try Dirty Bomb or the classic Wolfenstein: Enemy Territory for some class-based objective shooters. Both are free to play.

ET Legacy Wolfenstein Enemy Territory, FOSS client. Maybe moot since an official client re-released on Steam recently.

It doesn't replace any server, it's a new one on Legacy mod - https://www.etlegacy.com/

Look up ETLegacy some nice guys from the old scene have basically remastered it - hd graphics updated sounds etc. All things in one place!

ET: Legacy

Have you tried using ET Legacy? www.etlegacy.com It's basically the same ET client, but updated to current standards.

As you pointed you need source code that can be found here: https://github.com/etlegacy/etlegacy

Off topic, but if it was Wolfenstein ET I will just add that there still is a community for it and a Foss version of it that runs on modern operating systems

https://www.etlegacy.com/

Sounds very similar to Endless Sky[1] - another open source game drawing on the old Escape Velocity games. I really enjoyed both Endless Sky and the Escape Velocity games, so I'll have to check out Naev at some point!

[1] https://endless-sky.github.io/

There's an open source successor to Escape Velocity that's fun and continues to grow:

https://github.com/endless-sky/endless-sky

#2 - Endless Sky - ALSO inspired by Escape Velocity, but IMO this is more polished Escape Velocity clone and could reasonably be called the modern successor. EXCELLENT space trade/piracy/combat and definitely take some good strategy to get far into the game.

From the changelog

Bottom left of the website has discord invite link https://endless-sky.github.io