Yes, it looks like the developers behind the long running idTech2 based AlienArena are going make a more slower paced & 'tactical' spin-off and try to sell it. As before the engine will stay open-source (GPLv2), but the assets for the spin-off will stop being free-as-in-beer.
Here is the official launch-trailer of the new update and the alpha demo:
Beside the new game-play mode, they have also finally updated the menu, and the new version of it is rather spiffy. You can see it in action and more of the regular game-play in this recently uploaded random YouTube vid (warning: goofy British accents and profanity). GamingOnLinux also recently had a small preview-article.
Last but not least (while we are on the topic of idTech2 based games), a small game-developer's advertisement of a new project currently unfolding in our forums. If you know your way around Quake(2) based engines and/or pixelish art, please join the effort ;)
Free, libre games and development news