In your windows search bar, type in cmd and right click command prompt and open as administrator. In command prompt, type "sfc /scannow" without quotes. Wait for scan to complete. (Restart your PC afterward)

Verifying game files(official fix):

Right click the isle in steam

Then select properties

Then go to installed files

Then click verify integrity of local files

Dx12 reinstall:

Find disk cleanup(in windows search), remove directx cache

Go to the microsoft directx end-user runtime web installer page(google for it) and download the installer. Run the installer and follow the onscreen prompts. (After installation, restart PC)

Dr.Matrix/KeinZantezuken fixes
Fatal error fixes and grapichal fixes

So I have been able to find fixes for the gamethread timed out fatal error, fuzzy/pixelated graphics, and the beipi underwater night vision bug. This will set the games render scale to 100%, along with other changes that will increase the visual fidelity of the game, and solve the gamethread timed out fatal error.

Follow these steps:

Press Windows key + R, then type in %localappdata%
Delete the D3DSCache folder
Locate the engine.ini in TheIsle/Saved/Config/WindowsClient (in %localappdata%)
Open the engine(.ini) file, then copy/paste the following at the bottom of the file:

For Fatal Error:

[SystemSettings]

; Fix for gamethread timed out fatal error

g.TimeoutForBlockOnRenderFence=9999999

For graphics(bepi/denio nv, over pixelation/blurry graphics, some ghosting)(2 pages)

[SystemSettings]

; Fix for gamethread timed out fatal error

g.TimeoutForBlockOnRenderFence=9999999

; change this if you get any visual issues

r.ScreenPercentage=100

; Disabling VRS

r.VRS.Enable=0

r.VRS.EnableImage=0

; We will render at 100%, no need to upsample

r.TemporalAA.Upsampling=0

; Ignore these 3

r.TemporalAACatmullRom=1

r.TemporalAA.R11G11B10History=1

r.TemporalAA.HistoryScreenPercentage=100

; You CAN TWEAK these 2, see below

r.TemporalAASamples=2

r.TemporalAACurrentFrameWeight=0.08

; Disables FXAA

r.FXAA.Quality=0

; This will force TAA:

r.AntiAliasingMethod=2

; You can try 2, but I personally get very blurry pass so I stick with 0:

r.TemporalAA.Quality=0

Save the engine.ini file

Right-click on the engine.ini file, then go to properties

At the bottom under attributes, check the read-only box

Start the game

There is a possibility that this will bring your framerate down, as the game will be rendering at 100%, instead of 50% upscaled. All credit goes to KeinZantezuken on reddit for these fixes! Here is the link to the reddit post-

https://www.reddit.com/r/theisle/comments/14jp464/upd65_gfx_options_are_broken_do_not_use_anything/

Fatal error fix pt 2

If you are still getting the gamethread timeout fatal error after this, Try this(https://www.youtube.com/watch?v=Yh8-c-AsSp8):

Press Windows Key + R, then type in regedit

Navigate to- Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers

Right-click in big right hand box and hit new DWORD 32 bit value

Change name to TdrLevel

Right-click TdrLevel and hit modify

Click decimal, and make sure value is 0

Right-click and make another new DWORD 32 bit value

Name this one TdrDelay

Right click TdrDelay and hit modify

Click decimal, and change value to 60

Right-click once more and make new DWORD 32 bit value

Name it TdrDdiDelay

Right click TdrDdiDelay and hit modify

Click decimal, and change value to 60

Restart PC

Delete D3DSCache in %localappdata%

Run game

Easy anti cheat reinstall/install(official fix)

Follow the instruction on how to verify files but click browse instead of verify(or simply manage instead of properties and click browse from there)

First click “uninstallAntiCheat '', then “installAntiCheat” after this it should be fixed. If these files aren't available make sure you have Evrima beta branch and then verify game files.

If you crash with the ”Fatal error: [File:Unknown] [Line: 868] … cpp:910 with error 887A0006” error message, it seems this is due to a problem with DirectX rendering. To fix it, you can try to(compiled and found by .svartkonst.):

New doc with better fixes: https://docs.google.com/document/d/1lpCVwMDM7xEjdMgECgpC3bAy5B25Ty8OVVKj2p4kobk/edit?usp=sharing

- update your graphics drivers;

- if they're already up-to-date, uninstall your graphics drivers with DDU and reinstall them;

- if you have a Nvidia GPU, uninstall Geforce Experience and manually install the drivers through the Nvidia website;

- lower the FPS limit;

- lower your graphics settings;

- lower your resolution;

- disable Riva Tuner Statistics Server (it comes with MSI Afterburner);

- revert your GPU's overclocking including if it's overclocked from the factory;

- disable third-party software like for example any RGB software;

- configure The Isle to use your dedicated GPU: go in Windows settings > System > Display > scroll down and click on ”Graphic settings” > under ”Graphic performance preferences”, click on ”Browse”. Once here, follow this path to find The Isle app: This PC > Local C: drive > Programs (x86) > Steam > steamapps > Common > The Isle > TheIsle > Binaries > Win64 > select ”TheIsle-Client-Win64-Shipping” app (only click once) and then click on ”Add”. Once that's done, click on ”Options”, choose ”high performances” and confirm.

Maximum game instances fix found by “Fräulein_Unschuld”:

"You can create a new steam library with the steam client. Go to steam -> configuration -> Storage. There you can assign a new storage when clicking on +. Than the new storage shows up. Now you can move in the same window the isle to the new storage (where a new steam library was created). And than try again

Of course you need for that try a diffrent storage and Partitition (I also had it before on Disk C)"

Steam subsystem error(s)

Type cmd in the Windows research bar, right-click on command prompt, choose ”run as an

administrator”.

Type “netsh winsock reset”(without quotes), press enter, close the command prompt and restart your computer.

In netsh winsock dosent work try:
netsh winsock reset(agein)

ipconfig /flushdns

ipconfig /registerdns

ipconfig /release

ipconfig /renew

Otherwise:

Step 1 go into the folders to: Steam >Steamapps> common>The Isle> TheIsle > Binaries > Win64

Step 2: In the folder you're now in (Win64) you should see a file called TheIsleClient-Win64-Shipping. If you do, then you're in the right place. In this folder, create a text file named steam_appid. (A normal .txt file)

Step 3: open up your new steam_appid text file that you just created and add 376210 to the file. Just the numbers, nothing else. that is The Isle's Steam App ID

Step 4: Check and see if the game starts properly and you should be set with no more steam subs system error message and can play normally

If it doesn't work, it's Steam that's down in your area.

Credits(most creds here is just for ppl showing me the fix might not be the creator that is usually dev, tech support or a youtuber)
pretzel3819(me)(on discord)(dm me if you can not understand anything and have tried googling for a better guide)

Dr. Matrix#4273(for finding/making most of these fixes)(on discord)
KeinZantezuken(on reddit)(coming up with the fixes credited with in the document)

.svartkonst.(on discord)(for compiling the line 868 fixes steam sub systems)

leviathanslust.(on discord)(for finding the game instances)

*Easy possible fixes*

Reinstall gpu drivers(official fix):

Helps with a lot of different issues like xc0000[Insert number] error codes: