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46 Subsystems
22 Steam + 24 EOS Game Instance Subsystems, each one a 1:1 wrapper around its underlying SDK interface.
UE 5.5 / 5.6 / 5.7
Universal Online Services
One Unreal Engine plugin that exposes both Steamworks and Epic Online Services to Blueprints. 46 subsystems. No abstraction layer. Direct, typed, Blueprint-first access to every interface.
Steam
22Blueprint subsystems
EOS
24Blueprint subsystems
Typed APIsNo C++One plugin
Built for shipping multiplayer
Every Steamworks and EOS interface, surfaced as a typed Blueprint subsystem.
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Blueprint-First
Every method is a UFUNCTION(BlueprintCallable). Every event is a multicast delegate. Drop nodes onto a graph and wire them up.
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Steam + EOS, side by side
No abstraction layer. Both SDKs run in the same project, ready for whichever platform the player is on.
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Achievements + Stats
Unlock Steam achievements, ingest EOS stats, query leaderboards from Blueprint with one node each.
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Cloud Saves
Steam Cloud and EOS Player Data Storage. Read, write, list, delete - synchronous on Steam, streaming on EOS.
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Voice + RTC
EOS RTC voice rooms with mic / device / volume controls, plus Steam voice capture and decompression.
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Dedicated Server Ready
Steam Game Server lifecycle (Init / LogOn / Shutdown) and EOS Anti-Cheat Server are first-class.
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Anti-Cheat
Easy Anti-Cheat client + server runtime APIs surfaced as BeginSession / EndSession / PollStatus nodes.
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Cross-engine
Same source compiles cleanly against UE 5.5, 5.6, and 5.7. Per-engine prebuilt Dist binaries shipped in the same archive.
Every subsystem
Each one is a UGameInstanceSubsystem reachable from any Blueprint withGet Game Instance Subsystem. The full reference lives in the docs.
Steam (22)
01- ↳Core
- ↳Friends
- ↳Matchmaking (Lobbies)
- ↳User Stats + Achievements
- ↳Remote Storage (Cloud)
- ↳Apps (DLC + Build)
- ↳Utils
- ↳Screenshots
- ↳Music
- ↳Parental Settings
- ↳Remote Play
- ↳User (Auth + Voice)
- ↳Input (Steam Input)
- ↳Inventory
- ↳UGC (Workshop)
- ↳HTTP
- ↳Networking Sockets (Modern P2P)
- ↳Networking Utils
- ↳Networking Messages
- ↳Matchmaking Servers (Browser)
- ↳Timeline (2024+)
- ↳Game Server
EOS (24)
02- ↳Core
- ↳Auth
- ↳Connect
- ↳User Info
- ↳Friends
- ↳Presence
- ↳Achievements
- ↳Stats
- ↳Leaderboards
- ↳Player Data Storage
- ↳Title Storage
- ↳P2P
- ↳Lobby
- ↳Sessions
- ↳Ecom
- ↳Mods
- ↳Progression Snapshots
- ↳Sanctions
- ↳Reports
- ↳Metrics
- ↳Custom Invites
- ↳UI Overlay
- ↳Anti-Cheat (Client + Server)
- ↳KWS
- ↳RTC + RTC Audio
- ↳Version
Process
How it works
Three steps from drop-in to live calls.
Drop in the plugin
Copy Dist/UE5.X/UniversalOnlineServices into your project Plugins folder. Works on source or Launcher engines.
Set credentials
Project Settings -> Plugins -> Universal Online Services. Steam App ID and / or EOS Product / Sandbox / Deployment / Client.
Call from Blueprint
Get the subsystem you need (UOS Steam Lobby, UOS EOS Auth, etc.) and wire its events. No C++ required.
Support
Need help?
Read the docs first - if you're still stuck, hop into the Discord.