# UE 5.5 Steam Multiplayer: OSS Steam vs Advanced Sessions vs SteamCore?

**URL:** <https://forums.unrealengine.com/t/ue-5-5-steam-multiplayer-oss-steam-vs-advanced-sessions-vs-steamcore/2725731>\
**Category:** C++\
**Tags:** onlinesubsystem, Steam, unreal-engine, Multiplayer, CPP, Blueprint\
**Created:** [June 1, 2026, 8:37pm UTC](https://forums.unrealengine.com/t/ue-5-5-steam-multiplayer-oss-steam-vs-advanced-sessions-vs-steamcore/2725731 "2026-06-01T20:37:38Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![krisz\_0325](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@krisz\_0325](https://forums.unrealengine.com/u/krisz_0325)\
**Post date:** [June 1, 2026, 8:37pm UTC](https://forums.unrealengine.com/t/ue-5-5-steam-multiplayer-oss-steam-vs-advanced-sessions-vs-steamcore/2725731/1 "2026-06-01T20:37:39Z")

</div>

I’m developing a Steam-only 5v5 FPS in UE5 and planning to use a host migration plugin.

I’m trying to decide between:

- UE 5.5 + OSS Steam

- UE 5.5 + SteamCore

- UE 5.4 + Advanced Sessions

My priorities are:

- Stability and reliability

- Steam invites and overlay

- Steam Cloud

- Future support for Steam Inventory / microtransactions

- Compatibility with a host migration system

I’ve seen reports of Advanced Sessions issues in UE 5.5, but I’m not sure how serious they are. For developers currently shipping Steam multiplayer games:

1. Is OSS Steam stable in UE 5.5?

2. Would you recommend OSS Steam, SteamCore, or Advanced Sessions for a new Steam-only project in 2026?

3. If you’ve implemented host migration, which setup worked best for you?

Thanks in advance!

---

<div class="post-metadata">

**Author:** ![user\_da6f92a7847a9fc8e91ebc2406e8b43a8ba6ca0fc6f770a7d0c88f](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@user\_da6f92a7847a9fc8e91ebc2406e8b43a8ba6ca0fc6f770a7d0c88f](https://forums.unrealengine.com/u/user_da6f92a7847a9fc8e91ebc2406e8b43a8ba6ca0fc6f770a7d0c88f)\
**Post date:** [June 30, 2026, 2:57pm UTC](https://forums.unrealengine.com/t/ue-5-5-steam-multiplayer-oss-steam-vs-advanced-sessions-vs-steamcore/2725731/2 "2026-06-30T14:57:39Z")

</div>

Hi there! I’m facing the exact same dilemma for my project. Which route did you end up going with, and how is it working out for you?

---

<div class="post-metadata">

**Author:** ![krisz\_0325](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@krisz\_0325](https://forums.unrealengine.com/u/krisz_0325)\
**Post date:** [September 9, 2026, 3:06pm UTC](https://forums.unrealengine.com/t/ue-5-5-steam-multiplayer-oss-steam-vs-advanced-sessions-vs-steamcore/2725731/3 "2026-09-09T15:06:50Z")

</div>

Hi,  
I ended up using Steam Core Pro, it’s a goldmine for steam based listen server games! I’m just testing right now but I’m planning to write a host migration plugin for it because it seems like no one wants this feature so I’m doing it on my own…