I’m developing a Steam-only 5v5 FPS in UE5 and planning to use a host migration plugin.
I’m trying to decide between:
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UE 5.5 + OSS Steam
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UE 5.5 + SteamCore
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UE 5.4 + Advanced Sessions
My priorities are:
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Stability and reliability
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Steam invites and overlay
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Steam Cloud
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Future support for Steam Inventory / microtransactions
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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:
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Is OSS Steam stable in UE 5.5?
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Would you recommend OSS Steam, SteamCore, or Advanced Sessions for a new Steam-only project in 2026?
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If you’ve implemented host migration, which setup worked best for you?
Thanks in advance!