Unknown Worlds, the creators of one the most popular Half Life mods ever created, has just released a brand new teaser trailer for the highly anticipated Natural Selection 2.

Natural Selection 2 is pitted to be an immersive, online FPS that pits aliens against humans in a strategic and action-packed struggle for survival.  If you have ever played the cleverly designed original, you can expect even more classy game play mechanics.  Natural Selection 2 will be a commercial sequel to the popular Half-life mod offered at two different price points and is scheduled for release in Fall 2009.

httpvhd://www.youtube.com/watch?v=4NkvIlUR2js

Unknown Worlds is an independent game company in San Francisco, CA.