GAS

The Gameplay Ability System (GAS) is a modular gameplay framework provided by Unreal Engine for building complex character skill, attribute, and state systems. Its core components include Abilities for defining skill logic, AttributeSets for managing numerical data, GameplayEffects for handling attribute modifications and status application, and the GameplayTag system for condition evaluation and classification. GAS is widely used in the skill system development of action games, RPGs, and similar genres.