[2] Mixmediia, the author of City 17 for L4D and L4D2 has expedited one more City17 port , this time to Alien Swarm. A full 5 map campaign and it plays well.




[3] Lycosa has released a final version of his single map campaign, FrostyFinalV2.



Both maps are in vpk format and need to be downloaded and extracted to the addons folder before entering the game.