Unvanquished is a fast-paced, futuristic FPS with RTS elements, pitting technologically advanced humans against hordes of highly adaptable aliens. The player can choose from either team, providing a fresh gameplay experience on both sides of the conflict. The game is under highly active development, with a new alpha release being made at the beginning of each month.
Unvanquished is the premiere successor to Tremulous, and is ambitious in its goals as well as excelling in artistic quality. While their work on making it multi-OS accessible is incomplete, this does not provide valid ground for any demerit. It's incomplete, and therefore cannot be judged on said incompleteness. The rest of their work is beyond fantastic.