The Ultimate Fix: How To Completely Disable Mouse Acceleration In Marvel Rivals (2025 Guide)

Are you tired of your aim feeling 'floaty' and inconsistent in Marvel Rivals? As of December 15, 2025, the issue of hidden mouse acceleration and smoothing continues to plague PC players, severely disrupting muscle memory and competitive performance. This phenomenon, often enabled by default, causes your crosshair movement to be dependent on how fast you move your mouse, not just the distance, leading to frustrating overshoots and inconsistent tracking.

The good news is that the developers have introduced key settings to combat this problem, but they are often misunderstood or hidden in non-intuitive menus. This in-depth guide provides the definitive, three-step solution—from the simple in-game toggle to the advanced config file edit—to ensure you achieve perfect, 1:1 raw input and laser-like precision with every hero in the Nexus.

The Critical 3-Step Plan to Achieve Raw Input and Perfect Aim

For any competitive first-person or third-person shooter, achieving Raw Input is paramount. Raw input bypasses Windows and game-engine-level mouse processing (which often includes acceleration and smoothing) and takes the data directly from your mouse, guaranteeing a 1:1 translation of your physical movement to in-game crosshair movement. In Marvel Rivals, there are three distinct steps you should take, starting with the simplest, to ensure this is achieved.

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1. The Essential In-Game Toggle: Enabling Raw Input

The most important and up-to-date fix for mouse acceleration and mouse smoothing is the dedicated Raw Input setting, which was introduced in a post-launch update (and is a game-changer for aiming). If this setting is available, it should be your first point of action, as it is designed to circumvent the underlying input issues.

• Launch Marvel Rivals and navigate to the main menu.
• Click on the Settings icon (usually a gear).
• Select the Keyboard Tab. This is a common point of confusion, as players often look in the 'Mouse' or 'Controls' tab.
• Scroll down to the Combat section.
• Locate the Raw Input option and ensure it is set to 'On' or 'Enabled'.

Enabling Raw Input is reported to make your aiming feel 1:1, directly translating your physical mouse movement without any interference from the game engine's smoothing or acceleration algorithms. For many users, this single step is enough to completely eliminate the 'floaty' feeling and restore muscle memory.

2. Checking for the Dedicated Mouse Acceleration Toggle

Depending on the current game version and seasonal updates (especially following major patches like the Season 2 update, which has seen some reported input bugs), the developers may have added a more explicit toggle for acceleration and smoothing.

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• After enabling Raw Input, return to the Keyboard Tab in the Settings menu.
• Look for any options explicitly named 'Mouse Acceleration' or 'Mouse Smoothing'.
• If these options exist, ensure they are set to 'Off' or 'Disabled'.

While the Raw Input setting should override these, a belt-and-suspender approach is always best for competitive input settings. If you notice any residual input lag or inconsistency, double-check these specific toggles.

3. The Advanced Fix: Editing the User Configuration File

If the in-game settings (Raw Input and the toggles) do not fully resolve your aiming issues, or if you are dealing with a bugged input system following a major patch, the only guaranteed way to disable all forms of engine-level mouse processing is by manually editing the game's configuration file. This method was the primary workaround used by players before the Raw Input setting was introduced and remains a powerful troubleshooting tool.

Step-by-Step Config File Edit

This process directly modifies the UserSetting file, forcing the game engine to disable both acceleration and smoothing. This is a more permanent and powerful fix than the in-game options.

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1. Close Marvel Rivals Completely: Ensure the game client is not running.
2. Locate the Config File Path: Open your Windows File Explorer.
3. Navigate to the Settings Folder: Copy and paste the following path into the address bar (you may need to adjust the folder name depending on your launcher, e.g., Epic Games or Steam):

   %LocalAppData%\MarvelRivals\Saved\Config\WindowsClient

4. Open the Target File: Inside the WindowsClient folder, find and open the file named Input.ini using a text editor like Notepad.
5. Add the Critical Lines: Scroll to the very bottom of the Input.ini file. You need to insert the following two lines of code exactly as they appear:

   [/Script/Engine.InputSettings] bEnableMouseSmoothing=False bViewAccelerationEnabled=False

6. Save and Close: Save the Input.ini file and close the text editor.
7. Set File to Read-Only (Optional but Recommended): Right-click on the Input.ini file, select Properties, and check the 'Read-only' box. This prevents the game from overwriting your changes during future updates.
8. Relaunch Marvel Rivals: Start the game and test your aim.

By forcing bEnableMouseSmoothing=False and bViewAccelerationEnabled=False, you are directly instructing the Unreal Engine (which Marvel Rivals is built upon) to completely bypass these unwanted input filters. This is the most definitive way to ensure pure, unadulterated raw input.

Understanding the Impact: Why Mouse Acceleration Kills Your K/D

The term mouse acceleration, often referred to as 'mouse smoothing' in different contexts, is a mechanism where the distance your crosshair moves is not only determined by the distance your mouse travels but also by the speed at which you move it. This is a nightmare for competitive players for several reasons:

• Destroys Muscle Memory: Professional aim relies on muscle memory, where your hand learns the exact physical distance needed to turn 90 degrees or snap to a target. Acceleration breaks this by making that distance variable. A slow 90-degree turn will cover less distance than a fast 90-degree turn.
• Inconsistent Tracking: When tracking a fast-moving hero like Iron Man or Spider-Man, the acceleration causes overshoots or undershoots, making consistent aiming impossible.
• Input Lag Perception: Mouse smoothing, a related setting often tied to acceleration, can introduce a slight delay or 'floaty' feeling, which many players misdiagnose as general input lag. Disabling both dramatically improves the responsiveness of the controls.

For any player serious about climbing the competitive ranks in Marvel Rivals, eliminating these input inconsistencies is non-negotiable. The combination of the in-game Raw Input setting and the manual config file edit provides the definitive solution for a responsive, consistent, and competitive aiming experience.

Final Input Optimization Tips for Marvel Rivals

Beyond the core fix for mouse acceleration, there are a few other steps you can take to ensure your input latency is as low as possible and your aim is optimized for competitive play.

Disable Windows Mouse Acceleration:

Even with Raw Input enabled in Marvel Rivals, it is best practice to disable mouse acceleration at the operating system level. This setting is often called 'Enhance pointer precision' in Windows. To turn it off:

1. Open the Windows Search bar and type 'Mouse Settings'.
2. Click 'Additional mouse options'.
3. Go to the 'Pointer Options' tab.
4. Uncheck the box next to 'Enhance pointer precision'.

Optimal DPI and Sensitivity:

Experiment with a lower DPI (Dots Per Inch) on your mouse (e.g., 400, 800, or 1600) and adjust your in-game sensitivity accordingly. Lower overall eDPI (Effective DPI = Mouse DPI * In-Game Sensitivity) provides greater control and precision, especially for long-range heroes like Doctor Strange or Star-Lord.

By following these three critical steps—enabling Raw Input, checking for the in-game toggles, and applying the advanced config file edit—you will have successfully bypassed all forms of mouse acceleration and smoothing, giving you the precise, consistent control needed to dominate the Marvel Rivals battlefield.