UltimateEOSKit is a complete, Blueprint-ready Epic Online Services (EOS) integration plugin for Unreal Engine. Everything you need to ship a live-service game on Epic's infrastructure — no C++ knowledge required.

✦ Features

Authentication

Connect players to their Epic Games account in seconds using Account Portal, Dev Auth, or silent re-login with Persistent Auth.

Cloud Save

Save and load any `USaveGame` object directly to the player's Epic account via EOS Player Data Storage. Data follows the player across all their devices.

Achievements

Unlock achievements and query full progress with a single Blueprint node. Achievement IDs are configured in the EOS Developer Portal.

Multiplayer Sessions

Full session lifecycle: Create, Find, Join, Leave and Destroy EOS sessions. Find sessions with automatic retry, configure max players, LAN mode, presence integration, and invite permissions — all from Blueprint.

Friends Overlay

Show and hide the Epic Games Friends Overlay at any time. Listen for visibility events to pause or resume your game.

Easy Setup

One checkbox in Project Settings writes all required `DefaultEngine.ini` entries automatically. All credentials are entered in one place.

Blueprint Utilities

- "Get Last EOS Error" — always shows the exact EOS error code after any failure

- "Get Local Host Address" — returns the machine's IP:Port for listen-server sessions

- "Is In Session", "Get Active Session Name"

- "Is Friends Overlay Visible"