Installation

Prerequisites

• Unreal Engine 5.4 or later
• C++ project (or a Blueprint project with the plugin pre-compiled)

FWGASSystem requires the following engine plugins to be enabled:

Plugin	Module	Purpose
Gameplay Abilities	GameplayAbilities	Core GAS framework (ASC, abilities, effects, attributes)
Modular Gameplay	ModularGameplay	Component-based game framework initialization
Game Features	GameFeatures	GameFeature plugin/action system
Enhanced Input	EnhancedInput	UE5 input system for ability input binding

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Step 1: Enable Engine Dependencies

Open Edit > Plugins and enable all four engine plugins if they are not already active:

• Gameplay Abilities
• Modular Gameplay
• Game Features
• Enhanced Input

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Step 2: Add the Plugin

From SourceFrom Marketplace

Copy the FWGASSystem/ folder into your project's Plugins/ directory:

YourProject/
  Plugins/
    FWGASSystem/
      FWGASSystem.uplugin
      Source/
      Content/

Install FWGASSystem from the Unreal Engine Marketplace. The plugin and its dependencies will be configured automatically.

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Step 3: Enable the Plugin

Add it to your .uproject file or enable via the Plugins browser:

{
  "Plugins": [
    {
      "Name": "FWGASSystem",
      "Enabled": true
    },
    {
      "Name": "GameplayAbilities",
      "Enabled": true
    },
    {
      "Name": "ModularGameplay",
      "Enabled": true
    },
    {
      "Name": "GameFeatures",
      "Enabled": true
    },
    {
      "Name": "EnhancedInput",
      "Enabled": true
    }
  ]
}

Restart the editor after enabling.

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Step 4: Add Module Dependencies

Add the module dependency in your game's Build.cs:

PublicDependencyModuleNames.AddRange(new string[]
{
    "GameplayAbilities",
    "GameplayTags",
    "GameplayTasks",
    "FWGASSystem"
});

Optional Dependencies

If you only use FWGASSystem through Blueprints, you can add it as a private dependency instead. Public dependency is required only when you reference FWGASSystem types in your public headers.

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Step 5: Configure the Gameplay Ability System

If this is a fresh project, ensure GAS is properly configured:

DefaultGame.ini

[/Script/GameplayAbilities.AbilitySystemGlobals]
+GameplayCueNotifyPaths=/Game/GAS/Cues
bUseDebugTargetFromHud=true

AbilitySystemGlobals Initialization

In your GameInstance or GameMode, call the global init:

#include "AbilitySystemGlobals.h"

void UMyGameInstance::Init()
{
    Super::Init();
    UAbilitySystemGlobals::Get().InitGlobalData();
}

InitGlobalData

Forgetting to call InitGlobalData() is the most common cause of GAS-related crashes. Always call it during game initialization, before any abilities are activated.

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Step 6: Verify Installation

1. Open the Content Browser and navigate to any Blueprint.
2. Add an FW Ability System Component via the Components panel.
3. You should see the component's GrantedAbilities, GrantedAttributes, GrantedEffects, and GrantedAbilitySets properties in the Details panel.
4. Search for FW GAS Core Component -- this companion component should also be available.

If both components appear, the plugin is installed correctly.

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Loading Phase Note

FWGASSystem uses PreDefault loading phase. This means it initializes before most gameplay modules, ensuring that GAS types and modular gameplay registrations are available when your game module loads. You do not need to manage loading order in your project.