Left 4 Dead survival mode details

A while back, Valve announced some downloadable content for Left for Dead on 360 and PC. The announcement mentioned a new game mode to be released: “Survivor” mode. GameTrailers TV have revealed what this new mode will involve. According to the video, up to four players will attempt to set records on surviving hordes of zombies on 12 maps (whether the maps will be adapted from existing levels or brand new was not specified)- essentially, ‘who can last the longest against the waves of undead’. The DLC pack will also include Death Toll and Dead Air for Versus mode play.
I guessed it would be a “last man standing” type mode originally, but this is even better. the first thing I thought of was the mode in Timesplitters 2 where you had only a shotgun and increasingly big waves of zombies would shamble towards you. It got really hectic once you were up to about wave 20. With the speedy Left 4 Dead zombies in mind, this sounds like a brilliant new mode.
[Update] Valve just confirmed that the DLC will be free. Huzzah!











