Half-Life Fallout: Suicide Blitz 2 Easter Egg - Half-Life Fallout

With the return of featured campaigns on the Left 4 Dead blog, their latest addition "Suicide Blitz 2", has been rather popular with the community. Players have found an easter egg during the course of playing the custom campaign though, linking a few of Valve's other games to Left 4 Dead 2. If you can withstand the random squeals of enjoyment, you'll get to see some rather stellar level editing that's rarely seen outside of Valve's own games. Left 4 Dead 2 is also on sale for 33% off, grab it if you haven't just yet.

That is pretty amazing, would be so cool just to stumble upon that without knowing it was there!