How to Fix Uncharted 4 "Initial Startup Error" (AVX2 Support) If you’re trying to run Uncharted: Legacy of Thieves Collection
: Search for "AVX2-Bypass" repositories specifically tagged for Uncharted. PCGamingWiki
: Look for "Uncharted 4 AVX2 Fix" or "Legacy of Thieves AVX2 Bypass." uncharted+4+avx2+fix+free
: Some users report crashes during high-action sequences (like the Madagascar chase). Frequent saving is recommended. Troubleshooting Game Still Won't Launch
C:\SDE\sde64.exe -skx -- C:\Games\Uncharted4\Uncharted4.exe How to Fix Uncharted 4 "Initial Startup Error"
The initially faced significant backlash due to a strict AVX2 instruction set requirement that prevented the game from launching on older CPUs, such as the Intel 3rd Gen (Ivy Bridge) or earlier, and many Xeon models. While "free fixes" and emulators exist, their effectiveness is highly variable and often comes at a steep performance cost. The AVX2 Controversy: A Summary
While the game is now "AVX2-free" and playable for free via the update for all owners on Steam , keep your expectations in check regarding performance: Ensure your system meets the game's minimum system
on an older CPU, you might be hitting a wall. The game officially requires AVX2 (Advanced Vector Extensions 2)