L4D2: Beyond Dead

Описание: After seeing someone around the building, Ullrid went to the building that look accessible to enter inside the building (Locked in Hell) while UPMP9 and UMP40 have a deep "talk".
During looking search for Materials or any clues, she stumble a someone in the closet and found a guy looking around hiding.
Suddenly everything went dark to the point of blindness, Ullrid felt a gentle touch and was unconscious.
Woken up into the Unknown with the the three, Keith remember something but can't speak, but can only write a note that's in his pocket, he wrote the situation of what he remember what he was told by a certain "deity" in the helicopter. So he gave a note to Ullrid and she understand the situation, and do what must be done.
Wonder what happened to that chopper and how is he's here and who that person is?
/////////////////////////TIME
Stage 1 00:00 - 4:21
Stage 2 4:29 - 11:47
Stage 3 11:54 - 20:31
Stage 4 20:38 - 24:33
Mini holdout 24:34 - 26:51
Continue 26:52 - 31:13
Stage 5 31:21 - 33:50
Mini Holdout 2 33:51 - 35:35
Stage 5 continue 35:36 - 43:22
Stage 6 43:30 - 53:48
Stage 7 (Game Over) 53:55 - 1:02:08
Stage 7 1:02:09 - 1:03:00
FinaleStart 1:03:01 - 1:03:59
Finale Tank 1:04:00 - 1:05:09
2nd Wave 1:05:09 - 1:06:07
Double Tank 1:06:08 - 1:08:28
End Credit: 1:08:29 - 1:10:36