Alien Swarm for Free on Steam

What does the left 4 dead 2 team do on their spare time? Why not continue a UT2k4 mod on the source engine and release it for free? That’s exactly what’s going down this monday. Steam gamers can expect a free game called Alien Swarm, which is a top down coop shooter. In addition, we can expect the source code and modding tools to pop up as well.