FusionFix 4.0 Turns GTA IV on PC Into the Definitive Edition

Man, my favorite GTA by quite a bit with Vice City following. I recently played around the earlier version of the mod and radio stations.

Going to update it and give it another whirl. Rockstar really needs to do a proper remaster here for modern consoles, but I doubt they will bother. And you just know they won't relicense the music.
 
Is there a way to keep the camera centered behind your vehicle while you drive? Having to constantly move the camera with the car while steering is annoying. I forgot that was even part of the control scheme for this game.
 
Been a long time since I played this (close to 20 years now) and I remember enjoying the game a lot, might be time to go back...
 
Gave this a shot and promptly uninstalled and went back to v1.0.4.0 with Zolika patch. My performance is significantly higher there and I don't have to deal with the busted radio station situation. It just works. I was seeing frame drops down into the 80s with a 9950x3D and RTX 5090 from a CPU bottleneck. That was even with DXVK which puts me closer to 180+ fps at all times in the downgraded version.
 
Thanks for the thread. I was gonna try it, but the launcher directs me to an old ass email I haven't used in 10+ years. No clear way of how to update it.
 
Version 4:0 looks nice but it has some regressions compared to the older version i was using, for instance, headlights of cars won't cast Nico's shadow anymore, even when i enable all extra shadow options.
 
Thanks for the thread. I was gonna try it, but the launcher directs me to an old ass email I haven't used in 10+ years. No clear way of how to update it.
I remember having this problem and found some solution via google. Possibly just this, I am not sure:

Version 4:0 looks nice but it has some regressions compared to the older version i was using, for instance, headlights of cars won't cast Nico's shadow anymore, even when i enable all extra shadow options.
Yeah I think this was removed due to it causing bugs/other issues. Will hopefully be back at some point.
 
Is there a way to keep the camera centered behind your vehicle while you drive? Having to constantly move the camera with the car while steering is annoying. I forgot that was even part of the control scheme for this game.
takes 2sec in google to look it up, there is a mod and it needs this fusion fix
 
The small things like centered camera when driving is an awesome addition. I never could get used to the default off centered viewpoint.

As for the game, I'd be lying if I said I wasn't disappointed coming from the PS2 trilogy to IV, but the world and physics made fo an awesome sandbox, even if everything else was a let down.

Once I'm done replaying the goat Red Dead 1, I'll be installing this again.

Let's go bowling, cousin.
 
That looks great. For a while the 360 through BC was a good way to play due to inconsistent framerates on PC (although the resolution was 720p), but this seems to fix everything and then some.
 
Last edited:
I just installed the game with the FusionFix and Radio Restoration Mod on the Deck and ran into a few hurdles.

But I got it running, and in case it helps some of you too, feel free to use my guide.

Maybe I made it more complicated than necessary, but I'm not an expert and in the end this setup works for me:



Installation Guide Steam Deck:
  • Download GTAIV from Steam
  • Launch it once, set up the Rockstar App, adjust the resolution correctly, then close it again
  • Switch to Desktop Mode
  • Download Fusion Fix, extract it and copy the contents into the folder where the GTAIV.exe is located
    (best way: right click the game in your library -> Manage -> Browse local files -> go to the GTAIV folder)
  • In Steam right click the game -> Properties -> General and add the following line under Launch Options:
    WINEDLLOVERRIDES="dinput8=n,b" %command%


[Optional - install IV-RR-23-05-2025]
(restores the original radio stations / songs to the game)
  • Download and extract the Radio Restoration Mod
  • Add IVCERadioRestoration.exe to your Steam library through Games -> Add a Non-Steam Game to my Library
  • In Steam right click IVCERadioRestoration.exe -> Properties -> Compatibility -> select Proton 9.0-4
  • Create a new folder in Downloads
  • Copy the entire contents of the GTAIV folder (where you added FusionFix) into this new folder
  • Launch IVCERadioRestoration.exe via Steam
  • In the installer select the new folder in Downloads where the copy of the game is located
  • Run the installation in this folder
  • Once installation is complete, copy all files from the new folder back into the "real" GTAIV folder and replace all old files there

  • Done - have fun!

If you're wondering about all the copying back and forth: I couldn't find a way in the Radio Restoration Mod installer to select the real installation folder of the game, since the Windows installer apparently doesn't have access to the folder structure.
However, I can access the Downloads folder both via Dolphin and the installer.


With the 40fps limit (set in-game, not in the Deck menu) and a TDP limit of 13 watts, the game holds the framerate and consumes about 19 watts.
I'm sure there's still room for tweaking depending on your preference.

Display Settings


  • Brightness: ca. 50%
  • Contrast: ca. 40%
  • Saturation: ca. 40%
  • FOV: Standard
  • Subtitles: On
  • Radar: On
  • HUD: On
  • Weapon Target: Complex
  • GPS Route: On
  • Handbrake Cam: On
  • Language: English
  • Definition: On
  • Console Gamma: On
  • Console Auto Exposure: On
  • Motion Blur: Medium
  • Depth of Field: Low
  • Tree Lighting: PC+
  • Tree Alpha: Console
  • Bloom: On
  • Screen Filter: Default
  • Distant Lights: Project2DFX

Graphics Settings


  • Video Mode: 1280x800 (60 Hz)
  • Aspect Ratio: Auto
  • Texture Quality: High
  • Reflection Resolution: High
  • Water Quality: High
  • Shadow Quality: High
  • Night Shadows: Off
  • Texture Filter Quality: Anisotropic x4
  • View Distance: 25
  • Detail Distance: 31
  • Vehicle Density: 51
  • VSync: Off
  • FPS Limiter: 40
  • Anti-aliasing: Off
  • Volumetric Fog: On
  • Sun Shafts: On
  • Extended Sunlight Reach: On
  • Tone Mapping: On
  • Shadow Filter: Sharp
  • Graphics API: Vulkan
  • Resource Usage: 677 / 3072 MB

And don't forget to set the gamepad icons to Steam Deck under Controls.
With all these settings the game almost feels like it was made for the Deck.


Let me know how it works for you!
 
Last edited:
I use this as well for the classic Xbox 360 version look. Probably crushed blacks, etc. but it just looks good with this game. Maybe consider turning on SMAA, the performance impact should be minimal.
I did activate SMAA and the game looks phenomenal, even on the Deck if you ask me.
I also changed extra night shadows in 'game' to lampposts and headlights. It seems to work fine for my 40fps settings and gives the world a little more depths.
 
Last edited:
I have to say that this mod is fucking sweet and just another reason why I love PC gaming. Turning the "GTA IV filter" off actually reintroduces color back into the game world. One of my biggest complaints about IV was how damn and dreary and dull it looked. Playing this at 3440x1440 with super clean, colorful visuals and 160 FPS is just a dream.
 
I also changed extra night shadows in 'game' to lampposts and headlights.
For some reason I don't have that option anymore. I remember it from older releases.
Turning the "GTA IV filter" off
I am keeping it on I think. Usually not a fan of filters but this modded version of the filter looks just right to me, staying true to the original release while improving it.

Otherwise I think I will keep DOF at low, it is just too much at higher values.
Also doing 100/100 on the distance sliders and locking the fps to 100 in the in-game menu seems to be the best config for my machine.

What stands out to me is the great motion blur now. Remember, it was completely broken in vanilla.
 
View distance still hammers the CPU because the game will pretty much render the whole map I think. :messenger_grinning_sweat:
With 9800x3d it can "drop" to 120 (so far) but I just want a locked 144 so I am also going to reduce view distance. (Detail distance seems to be ok at 100 for me). I am not GPU limited with a 5090 at 4k.
Lol I doubt anyone would be gpu limited on this thing, but yeah, view distance stuff are definitely gonna be resource hungry and problematic comparing to many other visual settings. And tbh I really don't think this setting in iv are really that awfully unstable as they made it out to be? The geometry detail difference between default value vs maxed out are kinda hard to ignore generally speaking. I get it during xbox 360era you have to compromise the shit for acceptable performance , but for now as long as we are not rockin with totally dated hardware like cpu from more than ten years ago, get a somewhat decent fps with the fixpack workaround ain't gonna be a hard thing for most ppl at this point you know
And nowadays devs deliberately capped the lod limit to avoid potential performance issues in these huge open world maps, but once you find ways to bypass the gate, the situation is still gonna be same old story as gta iv here most of the time or , even performing way worse are not totally impossible, at least this is the case for r* games xd. Like gta v's max lod limit (maxlodscale) can reach up to 3 instead of default 1 before game gonna crash on startup (there are still random crashes on 3.0 too), the lodscale value of rdr2 with modding engine configs can reach up to 3 as well with massive stuttering and other weird crashing&glitching issues on couple of spots, ( grasslod can be bumped up to 6 or 9 while default max value are 3), making the draw distance stand toe to toe against many current gen games most of the time, although the performance penalty ain't gonna be kind to current gpus for a raster rendering game as expected
For some reason I don't have that option anymore. I remember it from older releases.
This one has been moved to game tab(right next to graphics setting menu), it's being labeled as "extra night shadows"
5FQNNMVT6z3MKXz2.jpg
 
Last edited:
Unfortunately, Nico's shadows have been removed from recent versions of the mod. You can't see this anymore:

489238024-ec02d32c-0d46-4592-a4d8-11b6cc3a0910.png
H4eRP6oySGQzzL6u.jpg


They added added some other stuff, like how the other cars cast shadows now when they get in front of your headlights. But i really liked the above result. So i might stick to an older version since they said they won't add this again.

I also don't like the new volumetric fog. It's very intense and makes the game look too foggy and washed out. I prefer the clean look without it, the game already has some sort of distance fog anyway.
 
Last edited:
Unfortunately, Nico's shadows have been removed from recent versions of the mod. You can't see this anymore:

489238024-ec02d32c-0d46-4592-a4d8-11b6cc3a0910.png
H4eRP6oySGQzzL6u.jpg


They added added some other stuff, like how the other cars cast shadows now when they get in front of your headlights. But i really liked the above result. So i might stick to an older version since they said they won't add this again.

I also don't like the new volumetric fog. It's very intense and makes the game look too foggy and washed out. I prefer the clean look without it, the game already has some sort of distance fog anyway.
Ah, I wondered why Nicos shadow is missing.
But other shadows seem to work.

But damn, the game can look beautiful.
These screenshots are straight from the Deck

JKhfK3ezYiCEGKEk.jpeg

7sa68VOcGvNToIPC.jpeg
 
Ah, I wondered why Nicos shadow is missing.
But other shadows seem to work.

7sa68VOcGvNToIPC.jpeg
GTA4 Liberty City is still the best looking open world city IMO. Its not as detalied or as fancy as, say, Cyberpunk, but its the right amount of detail and the art direction is the best. It just looks more real to me. Even more so than GTA5.
 
GTA4 is one the best games in the series. I like the goofy and openness of 5, but 4 just hits different. It's more raw and harsh which is what GTA stands for imo ever since 1 and 2.
Was planning on replaying this but a lot of bangers came out lately. Will do whenever the next drought hits again.
 
Ah, I wondered why Nicos shadow is missing.
But other shadows seem to work.

But damn, the game can look beautiful.
These screenshots are straight from the Deck

JKhfK3ezYiCEGKEk.jpeg

7sa68VOcGvNToIPC.jpeg

Timeless art style and graphic design. This is a prime example of a game that ages like fine wine.
 
Insane improvement.

956AT51.jpeg


J0ltXa0.jpeg

Yesterday I had some free time and downloaded the game and tried the mod. It looks incredible, the previous version of the mod had some sort of weird popping that made buildings appear and dissapear when turning the camera but with the new version everything worked flawlessly. What a great work.

The only thing that I really hope they can add at some point is checkpoints during missions. Its a pain in the ass to die or make a mistake in a mission and having to start from the beginning
 
Yesterday I had some free time and downloaded the game and tried the mod. It looks incredible, the previous version of the mod had some sort of weird popping that made buildings appear and dissapear when turning the camera but with the new version everything worked flawlessly. What a great work.

The only thing that I really hope they can add at some point is checkpoints during missions. Its a pain in the ass to die or make a mistake in a mission and having to start from the beginning

I finished the game recently and I didn't find it that difficult. I only died 3 times and only once during a mission due to a cosmic-level coincidence in the mission where you clear the construction site.

bVTlLCy.png


But it looks so damn good now that it makes me want to start another save.

bn8YDUl.jpeg


NLAylPv.jpeg
 
I finished the game recently and I didn't find it that difficult. I only died 3 times and only once during a mission due to a cosmic-level coincidence in the mission where you clear the construction site.

bVTlLCy.png


But it looks so damn good now that it makes me want to start another save.

bn8YDUl.jpeg


NLAylPv.jpeg

Do you know if its save to install texture mods with Fusion fix?
 
I really like it. I am playing it alongside enhanced Xbox Series version and it holds up well. I especially appreciate being able to use the image filter from The Ballad of Gay Tony on the other GTA IV releases. No more piss filter or gray filter for me. My only complaint is the damn Rockstar Launcher, but at least it can run in offline mode past setup.
 

v4.0.1 changelog:


  • Fixed some issues that caused the "Graphics API" option to not work correctly.
  • Fixed an issue that would cause taxi pathing to break when the "Turn Indicators" option was enabled.
  • Fixed a black screen issue on some Linux setups when anti aliasing is enabled.
  • Fixed the flickering windows in Tony's apartment in TBOGT.
  • Added a crosshair to the first person view on the Annihilator when using gamepads. Previously it was only visible when playing with keyboard and mouse.
  • Increased more limits for the "ExtendedLimits" feature.
  • Adjusted LUT encoding/decoding. The LUT library was also updated for this change. Thanks to Pumbo for the heads up.
  • Placed the halloween event cheat in a hidden spot in the game world.
  • Added a cheat code for TLAD to restore Johnny's unused black pants (not in the game world yet).
  • Latest version of DXVK was replaced with v2.6.2 for broader compatibility with older hardware (e.g. AMD Polaris and Vega GPUs)

Also: ⚠️ Automatic updater in version 3.5.1 and 4.0 may not work, update manually from this page, apologies for the inconvenience. A fix is implemented in this v4.0.1.
 
Been tinkering around with it and wow its so much better. I hope someone can get dlss or some better aa working on it.

Its strange some of the console assets look better then the pc version, like the trees. You can get the console mod here
It has a bunch of optional items.
time stamped at the trees.


vehicle pack
 
Last edited:
Been tinkering around with it and wow its so much better. I hope someone can get dlss or some better aa working on it.

Its strange some of the console assets look better then the pc version, like the trees. You can get the console mod here
It has a bunch of optional items.
time stamped at the trees.


vehicle pack


This is what the game needs, even at 8k there is tons of aliasing everywhere. That's why I would prefer a proper official remaster from Rockstar
 
How weird. I installed this mod randomly a few days back and I'd never seen this thread..

But yes, this mod is brilliant. I'm now doing a full playthrough with it, I forgot how much I liked this game. I still vastly enjoy it over V.

The humour and characters are excellent. The driving mechanics are on point and it's just good all round.

I even put Hell is us and Cronos on hold for it, for now 🧐
 
Am I tripping as well or did this mod add a few more radio stations too?

I've a few I don't recognise :pie_thinking:

Vice City, being one..
 
L61fctuSKlL8pb8U.jpg
7QHGfG3hlmExq2Ek.jpg
Qni5PIzbyV7KpwJY.jpg
ImENklq3cmWwNGQJ.jpg


I dont remember them being ingame? :unsure:

Dont have any other mods either 🤷‍♂️
Independence fm is self audio, been in the pc version from the very start along with Classic 104.1. Self Actualization and vice city fm are originally introduced in Ballad of Gay Tony dlc, back in 2020 after the official complete edition upgrade r* merged the dlc content with base game together , since then these dlc exclusive radio stations coexist with all existing gta iv stations
 
Independence fm is self audio, been in the pc version from the very start along with Classic 104.1. Self Actualization and vice city fm are originally introduced in Ballad of Gay Tony dlc, back in 2020 after the official complete edition upgrade r* merged the dlc content with base game together , since then these dlc exclusive radio stations coexist with all existing gta iv stations
Ahhh, that explains it then!

Yeah id mostly played the 360 version, on that console and BC. Even though id had the pc version since years ago, id never really got stuck into it, till now.

As a side note, was just doing the Brucie mission to steal Lyles car, and it locked up :messenger_face_steam:

Hope thats not a recurring theme..
 
If you want to mess around. This trainer works with fusionfix


installed (links are in the op)
Aru's ScriptHook (only ScriptHook.dll)
ScriptHook Compatibility Patch (only aCompleteEditionHook.asi)

This trainer
"Liberty's Legacy.asi" and "Liberty's Legacy" folder into the root of your GTA IV game installation folder.

The asi loader from fusionfix loads the asi files - I didn't need the asi loader mentioned in the op.

Various Fixes
 
Last edited:
Top Bottom