If you are searching for this fix because you found a "Free" version of the game online, proceed with caution.
If manually making a .bat file feels intimidating, the modding community has released a pre-packaged "AVX2 Bypass Launcher" for Uncharted 4. A quick search for "U4 AVX2 Fix free download" (from reputable sources like Nexus Mods or GitHub) yields a ready-to-go folder.
Inside that folder, you will find:
Just drop this folder anywhere, edit the Launch_Game.bat with your game path, and run it. This is the easiest "free fix" available.
void* aligned_alloc_32(size_t size)
void* ptr = NULL;
posix_memalign(&ptr, 32, size);
return ptr;
#include <immintrin.h>
// After AVX2 math and before SSE code:
_mm256_zeroupper();
struct DeferredFree void* ptr; uint64_t epoch; ;
thread_local vector<DeferredFree> local_freelist;
atomic<uint64_t> global_epoch;
void defer_free(void* p)
local_freelist.push_back(p, global_epoch.load());
void try_reclaim()
uint64_t min_epoch = /* min epoch observed among workers */;
for (auto it = local_freelist.begin(); it != local_freelist.end();)
if (it->epoch < min_epoch) free(it->ptr); it = local_freelist.erase(it);
else ++it;
Search engines are flooded with fake "AVX2 unlocker" software that asks for $9.99 or contains malware. Remember: Intel provides the SDE emulator for free to developers. Nobody should charge you for this fix. uncharted+4+avx2+fix+free
If a website asks for your credit card to download an "AVX2 patch" for Uncharted 4, close the tab. The tools described here (Intel SDE + a Notepad script) are 100% free and open-source.
As of late 2024, this AVX2 bypass works through the entire main campaign and The Lost Legacy. However, be aware of: If you are searching for this fix because
Subject: Mitigation of Illegal Instruction Crashes on Non-AVX2 Hardware Target Application: Uncharted 4: A Thief's End (PC Port) Date: October 2023
Navigate to your game installation folder. Usually: Just drop this folder anywhere, edit the Launch_Game
Inside, find the Uncharted4.exe file (or U4.exe depending on updates). Do not launch it.