Unreal features support

The aim of the GDK is to seamlessly support all native Unreal Engine features, making it easy to create and port any Unreal game code to run on SpatialOS, both in single server and multiserver configurations.

The following tables show the state of support of Unreal Engine features on the GDK, along with any caveats or workaround you should be aware of.

The timelines below aim to provide our latest best estimates on our feature delivery to help you plan your project. They should not be taken as commitments and are subject to change based upon feedback, changing requirements, and technical constraints.


Fully supported, available now
Supported with caveats or workarounds
Not supported

Single-Server Support

Support of Unreal features with the GDK in a single server-worker configuration:

Feature Area Feature Support Level Notes & Caveats
Gameplay Framework GameMode
Character / Pawn
Level Blueprints
Ability System
Property Replication Data Property Replication (C++ classes) Using fixed arrays instead of TArrays is significantly faster.
Data Property Replication (Blueprint classes)
Dynamic Object Reference Replication (C++ classes)
Dynamic Object Reference Replication (Blueprint classes)
Stably Named Object Reference Replication
Conditional Replication Replication condition active overrides (DOREPLIFETIME_ACTIVE_OVERRIDE as defined in Unreal documentation) do not work. COND_InitialOnly is not currently supported.
Delta Serialization
Fast TArray Serialization Supported, but slower than native UE.
RepNotify Callbacks
Actor Replication RPCs - Ordering
RPCs - Reliability RPCs can be unreliable under heavy load. This is planned to be resolved in the future.
Actor Roles
Static Subobject Replication
Dynamic Component Replication
Startup Actors
Replicated Blueprint Timelines
Multiplayer Gameplay Features Split Screen
Replay System
Character Movement
Vehicle Movement
Online Beacons
Online Subsystem Abstraction
Listen Server The GDK currently only supports Dedicated Server mode.
Optimization Replication Graph
Net Dormancy
Net Update Frequency
Network latency simulation commands
Unreal Profiler
Debugging Gameplay Debugger
Cheat Manager
Network Profiler Metrics related to Outgoing Bandwidth and Socket Send are not populated. Ack and Bunch metrics stem from the native Unreal Engine networking implementation and are not applicable to SpatialOS networking. Metrics related to Property Size are populated with an approximation.
World Building World Composition / Streaming (Level Streaming)
World Origin Shifting World origin shifting is not supported in multiplayer by Unreal. We will likely provide an alternate solution.
AI Behavior Trees
Environment Query System
Travel Server Travel
Client Travel
Seamless Travel
Build Configurations Unity Builds
Misc Physics Simulation
Chaos Destruction
Skeletal Mesh Animation System
Sequence Editor
Unreal Insights
Unreal Engine Versions Unreal Engine 4.25
Unreal Engine 4.24
Platforms PC
Xbox One SpatialOS has Xbox One support (announcement), but GDK workflows are not yet optimised for development on it.
PS4 SpatialOS has PS4 support (announcement), but GDK workflows are not yet optimised for development on it.
iOS iOS is in preview.
Android Android is in preview.

Multiserver support

The table for multiserver support is coming soon.

2021-02-08 Updated with editorial review: changed support level for Conditional Replication and Server Travel
2020-08-18 Updated with editorial review: changed support level and note for Network Profiler
2020-07-28 Added Unreal Engine 4.25 support and removed 4.23
2020-06-17 Updated with editorial review: changed support level for Gameplay Debugger, Replication Graph, iOS, and Android
2019-11-26 Updated with editorial review: Server Travel supported
2019-11-08 Added Unreal Engine 4.23 support
2019-10-30 Add replicated blueprint timelines.
2019-08-20 Updated with editorial review: Rescheduled Gameplay Debugger support.
2019-07-31 Added support for Dynamic Components, RPCs ordering, and Ability System (0.6.0 release).
2019-07-04 Online Subsystem abstraction support pushed out.

Updated 7 months ago

Unreal features support

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