Clarification about Epic Online Services Plugin

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Hello,

I am looking for some clarification regarding the Epic Online Services online subsystem plugin (EOS). I read that EOS enables cross-platform play but I am not sure I get the full picture.

My goal is to have a multiplayer game where users from Steam, Epic Store and potentially other platforms can play together instead of isolating the users of each platform.

What I am not sure about is this: When deploying my game to Steam, can I still ship it with the EOS plugin to retrieve the Steam user and Steam ticket id (need it in our backend) and to make ingame transactions on Steam? Or will I have to use the Steam online subsystem when shipping my product to Steam?

If I have to use the Steam online subsystem for this instead, will I still be able to join Sessions from a Steam client that have been created from EOS?

Will I have to compile my game once per online subsystem or is there a way to activate more than one online subsystem and switch between them at runtime?

Thanks in advance

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For anyone reading this, I was able to clarify some of the points:

  • EOS plugin can be used to retrieve the Steam user, but the Epic EOS Online Subsystem that is provided in-engine is quite limited. It is not possible to access the Steam ticket id. There is another EOS plugin that I am looking at, which provides more features:
    EOS Online Subsystem in Code Plugins - UE Marketplace

  • Ingame transactions are not part of the online subsystem as far as I understand, so this will require a separate plugin.

I still dont know about the rest.

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Hey, how is it going with the the EOS Plugin you mentioned?
I really dislike the normal EOS Subsystem, it is a pain to use.

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Hey, havent bought that plugin yet, sorry :slight_smile: I am also using the default EOS subsystem with EOSPlus for Steam right now.