Valve just announced that for there next DLC they will be releasing the custom map Cold Stream by the same developer as the campaign 2 Evil Eyes, then on top of that they will be adding the last of the L4D1 campaigns Blood Harvest, Dead Air and Death Toll.

www.l4d.com/blog/post.php?id=5019

Shame it won't be released for another 4 years or something.

Looks like we might get Cold Stream early though, for "Testing", then the other three...yeah, in the far flung future shortly after flying cars.

It'd be nice to have the other #1 campaigns tho.

I only played L4D one and 2 for their campaigns so looking forward to this. When it eventually comes out.

"L4D1 maps suit L4D2 much better and L4D2 maps suit L4D1 much better" (c) Zombie

Should spice no2 up bit more. The no2 maps just seem monotonous to me. Would love to watch some no2 players approach these maps.

Edited once, 17/2/11 - 6:00pm.

So they're re-releasing 3 old campaigns, and one that was made by an independant developer. So... what is Valve actually doing then?
I suppose it's better than another 3 map campaign. But I really hope they're putting more into it than just that.

Should be good to play the old no.1 maps.

The same thing all devs do. Pitch it like they are doing something, when in actual fact they're not. Valve and Treyarch have always be particularly good at this.

"We will continue to grow and support L4D1 while we sup...." HAHAHA yeah right idiots.

Im curious, how difficult is it to port the l4d1 maps to l4d2?

It's not always straightforward, for a few reasons:

1. The new infected can make locations imbalanced, for example the rooftop on No Mercy 5 ended up having railings added to reduce the effectiveness of the charger and jockey. If you think about the number of cliffs in, say, Harvest, you can see where a charger might become a serious design problem.
   
2. Invis walls etc may need to be tweaked
   
3. Some assets may need updating or modifying to deal with improved graphics
   
4. Some coding may need upgrading
   

On top of this, you have a significant amount of playtesting to try and ensure that the map is reasonably balanced for most levels of play. None of this can carry over from version1 since the presence of melee weapons and new SI can change the play style.

In particular, a number of the lower-player-skill defensive positions are trivially removed due to the spitter, which can lead to SI being dramatically overpowered in low-skill game events.

Invis walls should never have been put there to purposely nerf infected classes.

Hear hear! And whats all this talk about L4D1 SI better suited to L4D2 maps and vica versa? Sounds like you're just backing up a weak, left-field argument with a nice paradox.
If we are to take the recent addition of No Mercy into consideration, spitters are OP (just aim into the room they're in and fire), they had to add heaps of walls to the finale to stop death charges/jockeys from every angle (which by itself would suggest that the l4d1 finale is NOT suited to L4D2), and if u were to put the L4D1 SI in L4D2 maps there's like a million invisible walls that make no sense from a hunter's perspective, (skyline of trees for eg. -_-) and the highest points are usually off these inv walls anyway...the hunters thrive and fail off a map that doesnt physically (in a realistic sense) cater for them.

i cant wait to slap ass again

Sweet, the L4d1 campaigns are top notch.. cept toll.(which is fine in co-op)

I like toll > invisi walls aside