Possesses a Pawn to represent a non-player character (NPC) in a game.

Is an Actor that describes a 3D volume that is placed in a level in order to define level geometry (referred to as BSPs) and gameplay volumes. Used to block-out your levels for gameplay testing

Is a subclass of a Pawn Actor that is intended to be used as a player.. It subclass includes a collision setup, input bindings for bipedal movement, and additional code for movement controlled by the player.

Defines the behaviors and properties of a particular Actor or Object used in the creation of an Unreal Engine game.

Is a piece of functionality that can be added to an Actor. cannot exist by themselves, however when added to an Actor, the Actor will have access to and can use functionality provided by it

Class is responsible for setting the rules of the game that is being played. The rules can include how players join the game, whether or not a game can be paused, and level transitions, as well as any game-specific behavior such as win conditions.

Contains the information that you want replicated to every client in a game. It often contains information about game score, whether a match has started or not, how many AI to spawn based upon the number of players in the world, and other game specific information.

Is a user defined area of gameplay. They are created, viewed, and modified mainly by placing, transforming, and editing the properties of the Actors it contains.

The base building blocks in the Unreal Engine and contain a lot of the essential "under the hood" functionality for your game assets. Just about everything in Unreal Engine 4 inherits (or gets some functionality) from them

Are a subclass of Actor and serve as an in-game avatar or persona, for example the characters in a game. Can be controlled by a player or by the games AI

Is used to take player input and translate that into interactions in the game and every game has at least one. It often possesses a Pawn or Character as a representation of the player in a game.

Is the state of a participant in the game, such as a human player or a bot that is simulating a player. Non-player AI that exists as part of the game world would not have it

Self-contained unit that holds all the content and code that make up an individual game and coincides with a set of directories on your disk.

contains a list of Levels that are loaded. It handles the streaming of Levels and the spawning (creation) of dynamic Actors.