MultiWorld - Run different worlds in parallel with the option to transfer players and actors

UNAmedia · April 24, 2024, 4:22pm

Hello! The update for UE5.4 has been submitted to Epic. It should be available in a few days.

UNAmedia · May 6, 2024, 2:24pm

Support for UE5.4 is now available

Hello! MultiWorld for UE5.4 is now available on the UE Marketplace.

flooferlands · September 20, 2024, 4:38pm

I know the pricing is as high as it is because companies can afford it, but as an indie dev charging $300 for this is insane. I could buy a Nintendo Switch or upgrade my CPU with that money.

UNAmedia · October 17, 2024, 12:12pm

Fab and UE5.5

Hello everyone! Since we haven’t posted anything in a while, we wanted to share a quick update:

We’ve already started working on porting all plugins to UE5.5, so we’ll be ready to release them when the stable version is available.
Thanks to Epic Games, all our plugins will be available on Fab soon. The process should be completely transparent for all of you!

UNAmedia · November 21, 2024, 1:28pm

Support for UE5.5 is now available

Hello, MultiWorld is now available for UE5.5!

To install it: open the Epic Games Launcher, navigate to Unreal Engine > Library > Fab Library, search the plugin by name, press the Install to Engine button, select the desired engine version and then press the Install button.

UNAmedia · February 10, 2025, 1:26pm

Hot-fix v1.9.5

Hi everyone! Hot-fix v1.9.5 for ⁠MultiWorld is now available on Fab. It fixes a bug on UE5.5 where the GameInstance’s WorldContext can reset when unloading a Secondary World.

UNAmedia · June 7, 2025, 9:17pm

Support for UE5.6 is now available

Hello, MultiWorld is now available for UE5.6! We also updated the sample project on GitHub.

You can update and install it directly from the Epic Games Launcher.

UNAmedia · September 2, 2025, 3:04pm

Update v1.10.0

Hello everyone, we’re happy to announce the release of the new version 1.10.0 of MultiWorld. The update is available on Fab for UE5.4, UE5.5 and UE5.6.

Migration notes (from v1.9)

the new feature Auto handling of the Input Mode introduces a breaking change, since it’s enabled by default. We suggest to update your code to take advantage of the new feature, because it simplifies the Worlds’ initialization code and makes them able to work also when launched directly (helpful for testing them). To use the new feature in normal use-cases, you should simply move your code that configures the InputMode in the Levels’ BeginPlay method, removing the implementation of the IMultiWorldActorInterface interface if no more needed. If instead you prefer or need to preserve the old behavior: call UMultiWorldStatics::SetAutoHandleInputModeForMainWorld() once passing false during your game initialization; then set FMultiWorldLoadParameters::bAutoHandleInputMode to false on each call of the LoadWorld*() methods.
Function UMultiWorldStatics::EndWorld() is marked as deprecated and will be removed in a future update. Call UMultiWorldStatics::EndWorldWithDelegate() or the EndAllWorldsAsync BP node instead.

New features

Input Mode is automatically handled when switching between worlds. The feature is enabled by default and makes the common pattern of setting the Input Mode in the BeginPlay of a Level to work out-of-the-box also with MultiWorld, not requiring any change to existing code and allowing the Level to be tested directly with Play-In-Editor or with a simple OpenLevel. For advanced scenarios, the feature can be controlled by FMultiWorldLoadParameters::bAutoHandleInputMode and UMultiWorldStatics::SetAutoHandleInputModeForMainWorld(). Read more at Input Modes.
Added functions UMultiWorldStatics::EndWorldWithDelegate(), UMultiWorldStatics::EndAllWorldsWithDelegate(), EndWorldAsync BP node,EndAllWorldsAsync BP node.
Added the function UMultiWorldStatics::GetWorldPtr(), to retrieve a UWorld * given a FMultiWorldHandle.
Added the property FMultiWorldLoadParameters::URLOptions, it’s an optional string of options like the ones passed to the standard OpenLevel function. For example it can be used to instantiate a custom Game Mode in the loaded Level setting it to "?Game=<GameModeClass>".

Bug fixes

Fixed UMultiWorldManager::LoadWorldAsync() failing to load the same map multiple times.
Fixed an assert firing when using the World Partition.
Fixed an assert firing when using the World Composition in PIE.

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