I found out of this game when I was browsing the most popular 'new technic magazine' of Finland, MikroBitti (
www.mikrobitti.fi), and in the games section of the magazine I saw Tremulous shining at the position of "Game of the Month". And what took my curiosity was that I saw that this game was a modification from Q3A, which I play also, the most.
I quoted the text from word to word.

(of course, translated into english first

)
Quote from MikroBitti, MB (c) Magazine:"Game of the Month"
Tremulous
Originally Quake III Arena modification released Tremulous is a team based game which connects impressively realtime strategy into a FPS game. Players can either choose to be a spacemarine or an squishy alien, and both teams mission is a complete elimination of the opposing force. Battles are long and bloody, because it also requires to destroy enemy structures to win. Unlike all else internet FPS games, Tremulous requires a very good teamplaying from it's players. Protecting life vital buildings is more important than gathering points in the scoreboard, and it's more effective to proceed with a team than alone. The experience points gained from kills can be used to buy new weapons or improve to a greater alien.