A couple weeks back, Valve, a company who is well known for such huge hits such as Portal, Left for Dead 1 and 2 and innumerable incarnations of Half-life, released a new multi-player game, Alien Swarm.
Starting Friday morning, at 12:01am GMT (this afternoon at 4:01pm PST / 7:01pm EST), Steam is offering a free 24 hour trial of the PC version of Left 4 Dead. It’s a great opportunity to try out a (as I’ve heard tell) fantastic zombie survival game without any obligation or cost. It’s a great offer, so take advantage of it while it’s available!