It happened to me when I've uninstalled F.E.A.R, or maybe you deleted a file wich was important ?

Nope - none of the above, but something corrupted the save game files. I just finished playing through the entire game from start to finish, this time no problems. I would suggest that once you make sure at least one saved game file per level works and do not erase it until you have verified a working file on the next level. At least you should have a better chance of only having to go back a little way if the other files get corrupted.

HI guys IF no one has a fix yet try this!! IT works.
start Fear > go to the load save game option> select the saved games at the bottom should still point out saves from the beginning chapter at point of origin, if you usually quick save and dont do full save> load that stage> play around until the first checkpoint then press escape and select your latest quick save or auto save and continue to play where you left off. :D

Just want to be of help for anyone like me who will come here looking for an answer
I think I found a way to FIX this. At least it worked for me.

I basically tried to change some display option. I switched resolution from 640 to 1280 but I don't think this is it.

---->
I think the real workaround here was when I changed "Force Restart" to ON because I suppose there must be a problem on loading graphic engine when the new level starts. So THIS forced the graphic engine to restart every checkpoint and every start of an interval. It loads newly textures and so on. Its the only thing making sense to me so far, since to receive a "disconnected from server" error is quite weird on a Single Player match... Usually on Multiplayer it happens when a Mod fails loading or you don't have some files, or you ping too high, so this on FEAR likely happened because of a graphic engine failure. I suppose. This worked for me I didn't encounter this problem anymore between interval 4 and 5 and I could end Extraction point. Hope this helps.
<------

Someone suggested to start a new game, skip cutscene, and then load the savegame before the disconnection. It worked for me sometimes, but not always, sometimes it kept giving me the problem.

My rig if anyone is having the same problem:
Windows 10, R9 290X TriX OC, i7 4790k, 16GB RAM Corsair Vengeance Black DD3

Originally posted by eartahhj:

Just want to be of help for anyone like me who will come here looking for an answer
I think I found a way to FIX this. At least it worked for me.

I basically tried to change some display option. I switched resolution from 640 to 1280 but I don't think this is it.

---->
I think the real workaround here was when I changed "Force Restart" to ON because I suppose there must be a problem on loading graphic engine when the new level starts. So THIS forced the graphic engine to restart every checkpoint and every start of an interval. It loads newly textures and so on. Its the only thing making sense to me so far, since to receive a "disconnected from server" error is quite weird on a Single Player match... Usually on Multiplayer it happens when a Mod fails loading or you don't have some files, or you ping too high, so this on FEAR likely happened because of a graphic engine failure. I suppose. This worked for me I didn't encounter this problem anymore between interval 4 and 5 and I could end Extraction point. Hope this helps.
<------

Someone suggested to start a new game, skip cutscene, and then load the savegame before the disconnection. It worked for me sometimes, but not always, sometimes it kept giving me the problem.

My rig if anyone is having the same problem:
Windows 10, R9 290X TriX OC, i7 4790k, 16GB RAM Corsair Vengeance Black DD3

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Thanks for this mate, will try it :)

By the way, your rig is almost exactly like mine :D

Win10 pro R9 290x Sapphire, i7 4790k, 16 GB ram Cosair vengeance Red DDR3 1866mhz

The screwing-all lil' nasy bastard is hidden in PERFORMANCES---> ADVANCED GC SETTINGS---> GRAPHICS---> TEXTURES RESOLUTION. Put TResolution on"minimum", load your game, then :

Just put your settings back to the top and kick it.

<>

Originally posted by Ðeus ✠ Wolf:

The screwing-all lil' nasy bastard is hidden in PERFORMANCES---> ADVANCED GC SETTINGS---> GRAPHICS---> TEXTURES RESOLUTION. Put TResolution on"minimum", load your game, then :

Just put your settings back to the top and kick it.

<:spacewolves:>

Just thought I'd say that this did the trick for me. I'm currently playing through the Perseus Mandate expansion and was getting the error every single time when transitioning from Interval 4 to Interval 5. Cheers. :)

~ First time i see this error messing that way even after the fix : there is also another way to do it, but less effective : do this fix, then fast-save meters from the transitory point. It also works, but randomly : u may have to try several time for this one to work.
Everytime you retry, move slightly closer from the transitory point and do fast-save just before reaching it.

Worked for me when i didnt use the main fix, but, as i said, it might take several tries.

Originally posted by Deus ✠ Wolf:

The screwing-all lil' nasy bastard is hidden in PERFORMANCES---> ADVANCED GC SETTINGS---> GRAPHICS---> TEXTURES RESOLUTION. Put TResolution on"minimum", load your game, then :

Just put your settings back to the top and kick it.

<:spacewolves:>

This solved my problem at Interval 8. Thanks!

Originally posted by 𝔻𝔢𝔲𝔰🔸𝕎ᴏʟꜰ:

The screwing-all lil' nasy bastard is hidden in PERFORMANCES---> ADVANCED GC SETTINGS---> GRAPHICS---> TEXTURES RESOLUTION. Put TResolution on"minimum", load your game, then :

Just put your settings back to the top and kick it.

<:spacewolves:>

None of this works for me.

Allow the game to use more RAM (old games were limited to low RAM) by using Large Adress Aware[www.techpowerup.com] on the FEAR.exe

Here are all possible solutions for "Disconnected from server": https://www.pcgamingwiki.com/wiki/F.E.A.R.#Crashes

"Force Restart - On" fixed it

Originally posted by 𝕯𝖊𝖚𝖘𝓦𝖔𝖑𝖋:

The screwing-all lil' nasy bastard is hidden in PERFORMANCES---> ADVANCED GC SETTINGS---> GRAPHICS---> TEXTURES RESOLUTION. Put TResolution on"minimum", load your game, then :

Just put your settings back to the top and kick it.

<:spacewolves:>

Tranks you,