Have you read all the install instructions and patch notes?
For all of you that prefer to download via torrent here is the link: gameupdates.org
After downloading, please help to seed that beast ;)

Lost Alpha Clarification.
I am a lurker on other STALKER sites, reddit, discord etc. I still find confusion or misinformed posts about LA in its current state (DC and LAR). Hopefully this pinned post will help clear some points up.
One of the main points of confusion seems to be the story still. The illuminati part of the story and their cutscenes were removed in DC and LAR (Lost Alpha Revisited). Some were first removed in DC (1.4007) when it was released, in 2018. DC also removed the entire dream sequence in x16 so it plays as it did in SOC now. There was a "storyline changes" mod available in the launcher that got rid of others as well, but it is no longer there. However, it is integrated in LAR.
In LAR (Moddb.com) I removed the remaining cutscenes I felt did not belong. They still alluded to the illuminati story or did not make sense. Check the full patch notes pastebin link in LAR's description for more information.
Overall, the main story in DC and LAR is basically the same as SOC now. There are some people who enjoy earlier versions of LA though, in that case, the illuminati story is still intact.
Please read the below article for a little more info on the three versions of LA if you wish (note: I do not support DCE, nor was involved in it, the link below explains who was involved in DCE).
STALKER Lost Alpha: Revisited is released.........
With the announcement of STALKER 2 I see more traffic here, so I wanted to give a quick guideline on the different LA DC versions.
There is a new version of LA out (DC Extended). Check out the details below for more information.
STALKER LOST ALPHA: REVISTED (LAR), is formally known as "LB's Comp." LAR combines ALL of my previous mimimod/comp updates along with the revised Duty...
S.T.A.L.K.E.R. Lost Alpha v1.4007 Developer's Cut download part 1/6
S.T.A.L.K.E.R. Lost Alpha v1.4007 Developer's Cut download part 2/6
S.T.A.L.K.E.R. Lost Alpha v1.4007 Developer's Cut download part 3/6
S.T.A.L.K.E.R. Lost Alpha v1.4007 Developer's Cut download part 4/6
S.T.A.L.K.E.R. Lost Alpha v1.4007 Developer's Cut download part 5/6
Whatever issues I had awhile ago didn't pop up now I tried it on my new rig. So that got sorted, hope to get around to this soon.
Glad to hear it!
Hello, I have a problem. I can't complete quest find another way into the underground in Nort Hills. I get to the underground entrance and the quest is still displayed. Even after I go inside. I'm playing version 1.4007 DC. I tried going alone and then with Hermit. Nothing has changed, I still can't complete the quest, it's probably a bug. I enjoy the mod and would like to continue. If anyone knows of a solution or what I'm doing wrong, so write.
Hi,
Sorry, I have never heard of that happening... When you say you cannot "complete" the quest, so you already tried going into the entrance to the lab and nothing happens or what?
The entrance to the underground is marked on the map. When I get to the marker, nothing happens. The task is still in the PDA and cannot be complete. When I save the game and then load it, so the marker that is show on the map will disappears. But the good news is, that I've explored the underground, found a dead scientist, took his functional psi-helmet, and a task find the emitters appeared in the PDA. The task find another way into the underground still appears in the PDA, but because I can't complete the task, I'll ignore it and I'll go to the lab X16 find the emitters. Maybe it's because I went to the Hermit, then the Hermit marked me entrance to the underground, the marker appear on the map. Then I went the soldiers to see if they needed help with anything, I found out that Major Griboyedov needed help, I completed all of Major Griboyedov's tasks. Then I found out that the marker on the map that was supposed to show me the entrance to the underground had disappeared. Never mind, the main thing is that I can keep continue at playing the mod, it is all, have a nice day.
Ohhh interesting, so you did not go to the map marker after talking to hermit, but did some other tasks first? I am still not sure why that would happen, but it would seem like that is a bug if it disappeared later (some sequence got mixed up it seems).
Sorry I could not be of assistance, but at least you were still able to progress!
There's something else I remembered. I had an task kill the psy dog flock, given to me by Major Griboyedov. This task takes place near the entrance to the underground. The marker that was supposed to mark entrance to the underground was no longer there, if was there, I'd have gone underground by now. Before this task, I did the task kill the Fleshes and I died, when not notice the anomaly. Then I loaded the game and maybe that's when the game went wrong. Maybe if I hadn't died the marker would still be there and the task would worked. By the way, of this series, I've only finished S.T.A.L.K.E.R. Shadow Of Chernobyl, that was in May this year and I enjoyed the game. Then I found out how much content was cut from the game. So I decided to see if there was a mod, which would bring the deleted content back into the game and I found this mod. So I decided to play S.T.A.L.K.E.R. Lost Alpha and I enjoy this mod. In the future, I plan to play S.T.A.L.K.E.R. Clear Sky and S.T.A.L.K.E.R. Call Of Pripyat. I have become a fan of this series. It is all I wanted to write, have a nice day.
Ah ok, ya maybe that psy dog task was the conflict and caused a bug. Sorry I could not be of more assistance though. I am glad you are enjoying the mod regardless and even more happy you have become a fan of the game series!!
Hello and greetings
Currently I'm working on stalker anomaly textures and I need some of lost alpha textures
Basically it's not a copy and paste. It's more like combining these textures with metro and OG stalker then upscale and the rest of stuff.
The texture pack can be found on stalker gamma discord which called rotten life
So I want to know if I can have your permission of using these textures or not?
Thanks for your time
Sure, but please credit lost alpha/dezowave in the description of the addon or in a readme.
Hello again
Thank you so much for your permission sir !
I will mention lost alpha and dezowave.
By any chance if you was unhappy with the usage of lost alpha in this texture pack in the future I will delete it immediately.
Thanks again and have a good time.
Ahh, the good ol' days of Photorealistic Zone.