We first reported on Airsoft GI and Northern Five Entertainment's Left 4 Dead fan film earlier this month, and now the final video has been released. It follows the cast of the original Valve title as they work their way down zombie-infested city blocks. When things get a little too hairy, some help comes in the way of cameos from other gaming series.

I won't spoil who shows up (outside of the one in the image above), but several series are represented. If you keep a close watch, you might spot a former GI editor in there as well. You can watch the full fan film below.