Course: The Online Subsystem EOS Plugin - Epic Games Store Mobile

General Tutorial & Course Discussions
1

This course walks you through the minimum EOS features needed for your game with in-app purchases for the Epic Games Store Mobile

https://dev.epicgames.com/community/learning/courses/nek/unreal-engine-the-online-subsystem-eos-plugin-epic-games-store-mobile

2

Hi , @SebBergy2.0

thanks for this awesome tutorial :+1:

when I compiled the sample project ( EpicGamesStoreMobile ) for Android , i got some errors :

on MacOS with UE-5.8.0

Screenshot 2025-12-17 at 12.04.50
Screenshot 2025-12-17 at 12.04.501280×307 96.7 KB

same issue when compiled on Win11 :

Screenshot 2025-12-17 120246
Screenshot 2025-12-17 1202462398×665 82.6 KB

the following was configs in DefaultEngine.ini


[OnlineSubsystemEOS]
bEnabled=true

[OnlineSubsystem]
DefaultPlatformService=EOS

[EOSSDK]
bEnablePlatformIntegration=true


[/Script/OnlineSubsystemEOS.EOSSettings]
CacheDir=CacheDir
DefaultArtifactName=TestMobileEOS
PlatformConfigName=
RTCBackgroundMode=
TickBudgetInMilliseconds=0
bEnableOverlay=True
bEnableSocialOverlay=True
bEnableEditorOverlay=False
bPreferPersistentAuth=True
TitleStorageReadChunkLength=0
+Artifacts=(ArtifactName="TestMobileEOS",ClientId="xyza7..........",ClientSecret="9RXKx7QY............",ProductId="8d49............",SandboxId="p-9m...............",DeploymentId="10f7.............",ClientEncryptionKey="1111111111111111111111111111111111111111111111111111111111111111")
-AuthScopeFlags=BasicProfile
-AuthScopeFlags=FriendsList
-AuthScopeFlags=Presence
+AuthScopeFlags=BasicProfile
+AuthScopeFlags=Presence
+AuthScopeFlags=FriendsList
+AuthScopeFlags=Country
bUseEAS=True
bUseEOSConnect=True
bUseEOSRTC=True
bUseNamedPlatformConfig=False
bUseNewEcomFlow=True
bUseNewLoginFlow=true
SteamTokenType=Session
NintendoTokenType=NintendoServiceAccount

could you point me what am i missing?

thanks

3

This course on the Online Subsystem EOS Plugin provides a clear walkthrough of the essential EOS features needed for your game, including in-app purchases for Epic Games Store Mobile. It’s a helpful resource for Unreal Engine developers looking to integrate these functionalities efficiently.

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4

You don’t need native platform integration when shipping on the Epic Games Store. Native platform integration is recommended when you are shipping on another platform (like Steam, a console platform, etc…). You can remove this entry from your .ini OR set the value to false.

5

@SebBergy2.0 thanks , I was able to fetch 5 testing StoreOffer Items with this configuration:

[/Script/OnlineSubsystemEOS.EOSSettings]
CacheDir=CacheDir
DefaultArtifactName=TestMobileEOS
PlatformConfigName=
RTCBackgroundMode=
TickBudgetInMilliseconds=0
bEnableOverlay=True
bEnableSocialOverlay=True
bEnableEditorOverlay=False
bPreferPersistentAuth=True
TitleStorageReadChunkLength=0
+Artifacts=(ArtifactName="TestMobileEOS",ClientId="",ClientSecret="9",ProductId="8",SandboxId="p",DeploymentId="1",ClientEncryptionKey="1111111111111111111111111111111111111111111111111111111111111111")
-AuthScopeFlags=BasicProfile
-AuthScopeFlags=FriendsList
-AuthScopeFlags=Presence
+AuthScopeFlags=BasicProfile
+AuthScopeFlags=FriendsList
+AuthScopeFlags=Presence
bUseEAS=True
bUseEOSConnect=True
bUseEOSRTC=True
bUseNamedPlatformConfig=False
bUseNewEcomFlow=True
bUseNewLoginFlow=False
SteamTokenType=Session
NintendoTokenType=NintendoServiceAccount

since i haven’t subscribed Store Mobile (100$/year) , i stopped testing this plugin , thanks.