Metal Gear Solid: Snake Eater – How to Unlock FPS Without Slow Motion

By default, Metal Gear Solid Δ: Snake Eater locks the frame rate at 30 or 60 FPS. Many players attempt to uncap FPS, but improper edits (like changing FixedFrameRate in engine.ini) can cause slow motion or double-speed gameplay. This guide explains the correct method to fully unlock FPS without affecting game speed, using UE4SS mods.

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Step 1: Install UE4SS with Compatibility Fix

1. Download and install UE4SS with the MGS Delta fix:
   GitHub: MGS-Delta-UE4SS-Fix
2. This tool allows you to override the game’s default frame rate settings after they are applied, preventing the engine from reverting to 60 FPS.

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Step 2: Create UncapFPS Script

1. Navigate to UE4SS/Mods.
2. Create a new folder: UncapFPS/scripts.
3. Inside scripts, create a main.lua file with the following code:

-- stomp the menu every time it applies settings
RegisterHook("/Script/Engine.GameUserSettings:ApplySettings", function(self, bCheck)
  self:SetVSyncEnabled(false)
  self:SetFrameRateLimit(0.0) -- 0.0 to uncap
  print("[UncapFPS] ApplySettings -> limit forced")
end)

-- also hit on spawn
RegisterHook("/Script/Engine.PlayerController:ClientRestart", function()
  local gus = FindFirstOf("GameUserSettings")
  if gus ~= nil then
    gus:SetVSyncEnabled(false)
    gus:SetFrameRateLimit(0.0)
    gus:ApplySettings(false)
    print("[UncapFPS] ClientRestart -> limit forced")
  end
end)

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Step 3: Update Mods Configuration

1. Open mods.txt in your UE4SS setup.
2. Add the line:

UncapFPS : 1

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Step 4: Edit Engine.ini for Failsafe

1. Navigate to:

C:\Users\YOURUSERNAME\AppData\Local\MGSDelta\Saved\Config\Windows

2. Open engine.ini and add the following:

[SystemSettings]
t.MaxFPS=0
t.AllowFrameRateSmoothing=0
r.VSync=0
rhi.SyncInterval=0

[/script/engine.engine]
bSmoothFrameRate=False
MinSmoothedFrameRate=0
MaxSmoothedFrameRate=0

⚡ This ensures FPS is uncapped without causing slow motion or gameplay issues.

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Step 5: Launch the Game

• Start MGS Δ: Snake Eater normally.
• Your FPS will now be fully unlocked.
• No slow motion or double-speed glitches will occur.

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Conclusion:
By using UE4SS and following these steps, players can enjoy fully uncapped FPS in Metal Gear Solid Δ: Snake Eater while keeping gameplay smooth and consistent. This method is far safer than editing engine.ini directly and avoids common pitfalls like slow-motion bugs.

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