Networked Play In Editor

Launch Separate Server

Launches a separate server even if the net mode doesn't require it. This allows you to test offline --> server workflows by connecting to a server from the offline game.

Play Net Mode

Sets the net mode used for Play In Editor session:

• Play Standalone : Starts a standalone game. This will not create a dedicated server, nor automatically connect to one.

• Play As Listen Server : Enables the Editor to act as both the server and the client. Additional clients can be opened depending on the number of clients.

• Play As Client : Enables the Editor to act as a client. A dedicated server spawns behind the scenes to connect to.

Run Under One Process

Spawns multiplayer windows under a single instance of UE4. This will load much faster but have the potential for more issues.

Enable Network Emulation

Applies the selected network emulation settings when starting the game for the purpose of testing how your game handles network issues:

• Emulation Target : Applies the emulation settings to the Server Only, Clients Only, or Everyone.

• Network Emulation Profile : Applies a preset for incoming traffic and outgoing traffic. Options are Average, Bad, or Custom

• Incoming traffic : Applies settings that add latency and packet loss to all incoming packets. Can add minimum and maximum latency, as well as a percentage amount of packet loss.

• Outgoing traffic : Applies settings that add latency and packet loss to all outgoing packets. Can add minimum and maximum latency, as well as a percentage amount of packet loss.

Client

Applies the selected client settings when starting the game:

• Play Number of Clients : Opens a number of client windows. The first one will respect Play In Editor Modes options. The rest will respect the Run Under One Process settings.

• Route Gampad to Second Window : Routes the gamepad input suring a multiplayer session. If unchecked, then the first gamepad is attached to the first multiplayer window, the second to the second window, and so on. If checked, then the gamepad is routed to the second multiplayer window, allowing the first to be controlled by keyboard and mouse.

• Create Audio Device for Every Player : Controls how many audio devices are created. If checked, a separate audio device is created for every player. This will render accurate audio for every player's perspective at the cost of CPU performance. If unchecked, a separate audio device is created for only the first two players.

• Client Fixed FPS : Sets each client's framerate to an element in the list. Includes a Listen Server.

Server

Applies the selected server settings when starting the game:

• Server Port : Opens the chosen port for simple server networking.

• Server Map Name Override : Overrides the map launched by the server. Currently only used by the PIE_StandaloneWithServer net mode.

• Additonal Server Game Options : Adds additional parameters that are passed to the server as URL parameters.

• Additonal Server Launch Parameters : Adds additional parameters that are passed to the server as arguments.

• Server Fixed FPS : Sets the server to run at the specified framerate. Does not impact Listen Server.

• Multiplayer Viewport Size (in pixels) : Spawns additional clients at the width and height specified. Useful when you need multiple clients but only want to interact with one window.