| Issue | Likely Cause | Solution | | :--- | :--- | :--- | | | Physics not decoupled. Wrong DLL version. | Delete the mod files. Re-download from Nexus Mods (version 2.5 or higher). | | Game crashes when boarding | Frame rate exceeding 165 FPS. | Cap your FPS via Nvidia Control Panel to 144 FPS. | | Cutscenes stutter | Mod is locking cutscenes to 30 FPS by accident. | Edit FPSLimit.ini . Find CutsceneMode=2 and change to =1 . | | No sound during Sea Shanties | Old bug triggered by high FPS clearing audio buffers. | This is rare. Restart checkpoint. | | Cannot interact with the Jackdaw's wheel | HUD scale bug. | Hit Alt+Enter twice (windowed/fullscreen toggle). | Part 5: Is it worth it? The 144 FPS experience You might ask: "I played Black Flag at 60 FPS for ten years. Is 144 FPS really that different?"
Thanks to dedicated modders who reverse-engineered the Anvil engine, you can now sail the Caribbean at 144 FPS. Edward Kenway will swim correctly, shanties will play on time, and the horizon will scroll without a single tear or stutter. assassin 39-s creed black flag 60 fps unlock
While 60 FPS is the golden standard for smoothness, modern PC gamers use high-refresh-rate monitors (120Hz, 144Hz, 240Hz). For years, pushing Black Flag beyond 60 FPS caused the game engine to implode. Specifically, the AnvilNext engine tied physics, audio cues, and mission scripting directly to the frame rate. If you unlocked the FPS to 144, Edward Kenway would swim like he was made of concrete, ships would sail at light speed, or cutscenes would desync entirely. | Issue | Likely Cause | Solution |
Do not use "FPS unlocker" executables from random forums. Use the AC4 Fleet Pack or the D3D11 Wrapper method . As of 2025, the most trusted source is the Nexus Mods page: "Black Flag True 144Hz Fix." Re-download from Nexus Mods (version 2
Released in 2013, Assassin’s Creed IV: Black Flag is widely considered a high-water mark for the franchise. The thrill of sailing the Jackdaw through a hurricane, the beauty of diving into crystal-clear waters, and the chaos of boarding a Man O’ War are timeless experiences. However, for nearly a decade, PC players suffered from a bizarre technical limitation: