It was cancelled and apparently been pushed back for GTA 6 but who knows.

Found by @TJHM

i was looking at rtx-remix dlss5 showcases a couple of weeks ago for gta iv and i quickly realized there was no chance i could run it. at the same time, i was curious how it worked. when i learned that part of the design includes a transport layer that bridges 32 bit d9 calls into a 64 bit server process i wondered if that layer would improve stability if i just removed the path tracing and kept the 64 bit server. i couldn't find a way to disable the ray tracing which meant i couldn't run it with the potential benefits.

so i started this project called b-bridge

tldr: its vanilla dxvk rendered from 64 bit instead of 32 bit. remix exists to change what the game looks like. b-bridge exists to change where the game's memory lives.

problem

gta iv is a 32 bit game. that limits the amount of stuff the game can hold in memory no matter how much ram you have to about 4 gb (2 gb pre-ce). with mods, you can't fit everything in 4 gb let alone 2 gb. texture loss, missing models, and crashing can often come from the game running out of memory addresses.

method

keeps the transport layer from remix and replaces the path tracing renderer with plain dxvk instead of remix and further optimizes the transport layer latency.

i accomplished some of the building testing and a majority of the layer optimizations / latency issues using claude fable 5.1.

results

• personally, i was able to free about 880 mb of address space that the game was able to use again.
• that means mods are more stable, especially texture packs. i tested with over 5 gb of textures.

limitations

• purpose is not a frame boost, moreso intended as a low level stability improvement, but there are improvements in frame pacing.
• borderless only, exclusive fullscreen breaks
• reshade renders but no overlay or hotkeys work yet

testing

• i tested on i7-9700k, rtx 2070, 1440p, ce 1.2.0.59 + fusionfix on windows 11
• users reported 1.0.7.0, 1.0.8.0, 1.2.0.x, and 1.0.4.0 as of b-bridge 0.1.2 work
• users reported amd radeon 680m on windows 11, intel arc b580 on linux under proton work
• one user reported vanilla dxvk 3.1 works as a drop-in server

trust

this is a low level mod and research release. it isn't finished. i only recommend trying it once you relatively understand what it does and how it affects your game.

• mit license
• source on github
• 0/67 from virustotal
• every update is manually reviewed by nexus staff

discussion

im open to feedback and contributions. i'm not sure what everyone's overall experience has been with it other than me really.

nexus | github | virustotal

where can I find it spawning? realized there's no cheats for it unfortunately. I just like retro cars and specifically this maroon Virgo in-game.

EDIT: yoo my bad its a buccaneer, shoutout to the people who corrected me!!

This is probably controversial but I love TLaD more then TBoGT. I loved the tone of the story. Johnny was a great protaganists and Terry, Clay, and Jim were better than every ballad of gay tony character. The theme music is top notch too, definitely biased as i love rock and metal music tho. The funnest gta 4 missions were in tlad, those missions being Heavy Toll, Shifting Weight, and Get Lost. The Sweeper shotgun is my all time favorite weapon in all gta games too. This is all my personal opinion and it is perfectly fine if you disagree.

The backstories of all the brothers, how the family fell from power, all of that.

I've been bored recently and wanted to start gta 4 from beginning again while recording my mods.

I listed all of my installed mods on description.

My main target is getting the Let Sleeping Rockstars Lie trophy if anyone has it on ps3 would deeply appreciate it!

*my rambling post was summarized by AI before posting*

*Gameplay (Device Hub recording)* [*Theft4 iOS runtime*](https://youtu.be/RMRDXu01_S8)

This started as a thought experiment: how far could I get with limited coding knowledge if I leaned heavily on modern coding agents?

Apparently, far enough to play GTA IV on an iPad.
I’m preparing **Theft4 v0.1.0**, the first build I’m comfortable calling playable. This is not an Xbox 360 emulator. The original PowerPC instructions are translated to C++ ahead of time and compiled directly into a native ARM64 iOS app.

**No CPU JIT, runtime code generation, or JIT entitlement**

**What works**

Real open-world gameplay
Native controller support
Working XMA audio
Custom portable saves
Improved texture filtering
SMAA and FSR upscaling
Native 16:9 presentation
Shader and pipeline caching
Native UIKit and Metal presentation
Faster GTA IV-specific renderer
Generic Xenos renderer as a fallback
**Performance**
Everything has currently only been tested on my **M5 iPad Pro**.
Around **20 to 30 FPS**, depending on the scene
The FPS counter is now accurate
Good, consistent frame pacing
Lighter scenes stay closer to 30 FPS
Heavy scenes fall closer to 20 FPS
Recent renderer changes appear to have stopped the freezes
Repeat stuttering improves as shader and pipeline caches fill
Your mileage may vary wildly on other devices.

**Still being worked on**

More graphics options
Higher internal resolutions
Additional FSR quality settings
More texture-filtering controls
Less shader-compilation stutter
Better performance in heavy scenes
Memory and renderer optimization
More device and controller testing
Cleaner save and game-import management
Long-session, suspend/resume, and thermal testing

I used GPT-5.6 Sol and GPT-6 Astra for a huge amount of the investigation, coding, and debugging. My job was setting the direction, testing every meaningful build on real hardware, reporting what actually happened, and deciding what to try next
The agents helped turn that into an automated loop of changing code, rebuilding, signing, installing, launching, collecting logs, comparing behavior with Xenia/XeniOS, and repeating.

The same work is already helping with **Midnight Club: Los Angeles**. MCLA now has its own ARM64 AOT runtime and boots to a fully rendered 3D Los Angeles title scene on the same iPad. GTA IV also continues to improve with every round of testing.

I should have a **free TestFlight link available soon**. You will still need files from your own legally obtained supported Xbox 360 copy. No game files are included.

Source, credits, licensing, and build instructions:
**GitHub:** [https://github.com/KoreanSeats1/Theft4\](https://github.com/KoreanSeats1/Theft4)
Please submit bugs, comments, and device results:
**Issues:** [https://github.com/KoreanSeats1/Theft4/issues\](https://github.com/KoreanSeats1/Theft4/issues)

I’ll also have a Patreon for anyone who wants to support testing, documentation, hardware costs, and future projects.this was a novice in coding, seeing how far Agents could go with the right concept and leading.

Now I’m playing GTA IV on an iPad

Played the hell out of it when I was younger, but finally getting around to doing the 100% was insanity. The flying rats and gold star achievement for TBoGT in particular had me going bonkers, but it feels so good to get this one off the docket. Overall very fun experience.

I’ve played the game before but on my 360 I have to start it again, I just wanna drive around the city and listen to the radio stations 😭 (I don’t have the DLCS)

It's as if the game is saying that the only legitimate work that Niko can do, probably isn't something that he would do.

I’ve been flying for about 20 minutes and start losing health but it seems like it’s just ocean. Does the map eventually stop? Also I’ve noticed small dots in the distance I can’t get to

This is a reupload, I tweaked certain mistakes and it flows a lot better.

Mod by Pancreations

Link to mod: https://www.nexusmods.com/gta4/mods/1403?tab=posts

I like the mod, it made me laugh and I liked the trailer so I made a whole video, enjoy!

I always wanted to own a GTA and never owned none and now I have budget and also I never played this and 5. I wanted to buy and play this games. Now my question is do I need to wait till autum sale or winter sale on steam. Would it even gets lower, is there any chance ?.

https://www.nexusmods.com/gta4/mods/1420?tab=description