You might find it hard to imagine that a AAA game on the scale of GTA 5 could actually run natively on an iPhone, but it really has been done. A developer on X C22 Recently, a video was released showing GTA 5 running full 3D gameplay on an iPhone, with full touch controls, averaging 50 to 60fps, while using only 1.1GB of iPhone memory. The creator says it is a natively compiled Mach-O executable that runs directly on iOS, uses the Metal graphics path, requires no jailbreak and no JIT compilation, and performs all computation locally on the phone.
How to implement: from browser to Mac to iPhone
To understand this transplant, first look back at the one from October 6. WASM eventThat day, an anonymous website called playgta5.com went online, packing GTA 5 into a Chrome tab. The compressed asset package was about 700MB, and it was claimed to run at 60fps on sufficiently powerful hardware. Low input latency proved it was running locally, not via cloud streaming. But the site lasted only a few hours before Take-Two took it down. The domain was a privacy-protected domain registered only on October 3, and no one came forward to claim it. The community speculated that it was based on the GTA 5 source code leaked in September, but it was never confirmed.
C22 personally explained the lineage in the comments: “This is a recompilation of that recent WASM version. It’s essentially based on it, but a lot was done under the hood to get it running natively in Mach-O, which amounts to removing the browser layer.” In other words, the WASM version proved that GTA 5’s engine logic can run in a non-native environment; C22 removed the browser intermediary layer and replaced it with an iOS native executable. He also revealed that this version was actually ported over from his own macOS port—the Mac version came first, then the iPhone version.
Rationale: remove the browser, replace it with Metal.
The technical approach can be broken into three layers. The WASM version compiles the x86_64 game engine into 64-bit WebAssembly, splits background computation across multiple Web Workers, uses WebGPU for rendering, converts about 6,600 shaders to WGSL, and stores assets in the browser cache. Another independent developer’s self-hosted version reveals more details: 20GB of game data is streamed from a local server into browser storage, JavaScript patches bypass corrupted video files and missing textures, and the frame rate is locked at 30fps for stability, but the browser’s memory limit frequently crashes the game.
The key step for C22 was removing the browser. WASM runs inside the browser, drawing has to go through WebGPU translation, and you still have to fight the browser’s memory wall. After recompiling into a native Mach-O executable, the game makes direct iOS system calls and drawing goes through Metal, with no middleman. The author says the WASM part was where he leaned most heavily on outside help, while the Metal-related work was mostly hand-written; during development he used Opus to help handle corners he wasn’t familiar with, but the main body was written by him and he led the direction himself. This also explains the performance gap: the browser version locked at 30fps for stability and still crashed, while the native version doubled straight to 50 to 60fps.
gta v running natively on ios (a recent fun project of mine) https://t.co/5k6w06hoLY
— C22 (@c22_dev) October 9, 2026
Key number: 1.1GB of memory is the biggest highlight.
The author personally gave three data points: iPhone 17 averages 50 to 60fps, uses Metal, and consumes 1.1GB of memory. The frame rate is impressive, but the memory figure is more intriguing. The PC version of GTA 5 can easily use over ten GB of memory, while here it is squeezed down to 1.1GB, meaning resource streaming and texture management have been heavily overhauled and likely only load chunks within the field of view. But the author also admits the game will allocate up to 3GB of memory, which an iPhone 11 cannot accommodate; he estimates only models after the 13 Pro have a chance.
The control group is the emulator approach. In March this year, someone used the XeniOS emulator to run the Xbox 360 version of GTA 5 on an iPhone 17 Pro Max. The principle was to translate PowerPC instructions into ARM in real time while emulating the entire CPU, GPU, memory, and audio architecture. The result was only 15 to 20 fps, and driving scenes dropped straight into single digits. Native recompilation eliminates the overhead of real-time translation, so the frame rate jumping by leaps and bounds is expected. This is also why the author emphasizes not using JIT: JIT is a crutch for emulators, and native executables don’t need it.
Controls: both touch and controller are ready.
The video thumbnail shows a complete touch layout on the game screen: a virtual joystick on the left for walking, and JUMP, ENTER, RELOAD, AIM, FIRE lined up on the right; PAUSE, PHONE, MENU in the upper left; CAM, CROUCH, COVER, WEAPON in the upper right. The creator says he played the entire test with a controller, and when someone asked about controller support, he replied not to worry. iPhone 17 can run it, and he joked that there’s no need to worry about laptops, making it clear the Mac version has long been playable.
Don’t even think about multiplayer mode for now. Someone asked whether they could play FiveM, and the author repliedHe wrote a bare-bones multiplayer feature for the Mac version.But the quality is terrible, don’t count on it.
Copyright crackdown: Take-Two has already swung the axe once.
The biggest wild card is lawyers. The WASM browser version lasted only a few hours before Take-Two pulled it, and this company’s legal team is known for being swift, ruthless, and precise. C22 has clearly learned his lesson: he says he’ll release it, but he won’t provide game assets; players have to supply their own. This is the standard self-protective stance for open-source rewrite projects. re3, reVC, and other predecessors all did it this way: open-source the engine rewrite, and let players copy the game data themselves from legitimate copies. But GTA 5 and Vice City have a fundamental difference: older games have a complete reverse-engineering foundation, while GTA 5’s RAGE engine plus hundreds of GB of assets make a clean rewrite almost impossible. The base is very likely tainted by source code leaked in September, making the distribution risk much higher than that of its predecessors.
As for the release timing, the author only replied “eta s0n” and gave no date. Even if it’s released, whether it can make it onto the App Store is another matter: being installable without a jailbreak means sideloading or enterprise signing, and it has to get past both Apple and Rockstar. Rockstar itself has never brought GTA 5 to mobile. The older trilogy and San Andreas both have iOS versions, but GTA 5 alone doesn’t; the official stance is that they’d rather you stream it from PC via Steam Link. If this C22 build starts circulating, it amounts to doing what the official side won’t do, and its fate will be the same as the WASM version.
Phones running 3A: the door has truly opened.
Lay out the timeline, and you can see how fast the barriers are collapsing. In March, the emulator at 15fps was watchable but unplayable; in early October, the browser version at 30fps prioritized stability; on October 9, the native version hit 60fps with controller support. With the iPhone 17’s A19 Pro plus a vapor chamber, running the native port of Resident Evil 4 can already hold a stable 60fps without throttling. The hardware has been ready for a while; the only thing missing is someone to feed it PC games. C22 proves this path works—and that one person plus an AI assistant is enough to make it work.
But manage expectations first. This is a personal side project, and the author himself frames it as just for fun. There’s no public testing, no device compatibility list, and no guarantee of long-term maintenance. 50 to 60fps is the number on his iPhone 17; whether it drops frames during a car chase through downtown Los Santos, nobody knows. When it’s released, people with an idle old device can give it a try; don’t put unknown executables on your main device.
Source: KOCPC Chinese