I already tried contacting support about this, but I have gotten no replies so far so I'll address this here as well, seeing this is kinda important.
So, I'm unable to download Dark Fall 2: Lights Out either on the GOG Downloader or from the browser. The reason? The file is only 588.6MB (617 184 144 bytes), which is 114MB short.
81RED said here that he got it working but I'm getting the same 588.6MB file no matter how and when I click the browser link.
The GOG Downloader got over the 100% of the file and when trying to restart it, I can't restart the downloader any longer so I'm left with the browser download.
What's the deal?

Nothing yet.

The weekend got in the way, but i'm hoping they'll sort this out for you guys real soon.

Yeah right.
Yesterday i found out that they fucked up some settings and that the messages were marked as solved, even thought they weren't.
But still no luck on downloading the proper file.
GOG tells me the usual crap about using the downloader , use a different OS - buy a new pc - move to another location and buy a big mac at mcDonalds.
Do these people actually read a message in wich i explain that the file is corrupted or server with problems.
Keep it up GOG , i quit.

Thank you Venom.
Finally a post from GOG that makes sense.
I have to admit this whole thing really pissed me off .
Good to know there will be an alternate download location.

Thanks Venom , it seems to be fixed now.
Even the actuall download link shows 702mb now.
@Daedolon , come and get it. ( if you don't have already , that is. )

I got it earlier, but since it's fixed for me at home as well it seems we're good here. Thanks, Venom!

I seem to be having the same problem. the download was running fine and then jumped to done rather quickly compared to the rest of the download. i didn't run into any problems with installing or opening the game, but there seems to be a problem with the in-game action sequences. according to multiple online walkthroughs, there should be a man's voice near the start that directs you to a door that continues on the game story, but it is not present in my game, and manually looking at the door doesn't get the game moving forward. i am effectively stuck at the start of the game.

Venom, your link is dead, could you possibly help again?