Extended version with all 6 chapters from various versions before DC.

1: "Citylights" cut map which was featured in L4D1 and in L4D2 until v4.1
2: "Anna Is Gone" which is set in daytime instead of morning like in DC
3: "The Mall" with non-randomized unskippable air conditioner event
4: "Clean Up" from v4.1 with must-not-fail customer counter event
5: "Undead Center" from L4D1's b0.9 until v1.15 then got back in L4D2's v4.1
6: "New Dawn" from v4.1 with 2 tank fight finale before rescue vehicle arrives

Cubemap reflections fixed, few missing sounds and textures restored.

Creator: Darth Brush
Mashup: Herbius
Fixes: Me