Plugins & tools

Unreal Engine 5 plugins

All of our plugins are designed for Unreal Engine 5 and available on the Fab marketplace. Our SandwichKit plugins are also free and open source on GitHub.

Visit our Fab store Open-source SandwichKit

Free & open source

SandwichKit

Our open-source plugins for Unreal Engine 5. MIT licensed, built in the open on GitHub, with contributions welcome. Sandwich Steam is the first.

All our repositories on GitHub

SandwichKit · Open source

Sandwich Steam

SteamMIT licenceUE 5.4–5.8v1.0

Steam for Unreal Engine 5, made friendly. Achievements, stats, leaderboards, lobbies, voice chat, Steam Input, cloud saves and more, from Blueprints or C++. Set it up from an editor dashboard instead of hand-editing config files, and package and upload builds with the built-in publishing tool.

View on GitHub Read the docs Get it on Fab

Blueprint first. Every feature has Blueprint nodes, so no C++ is needed to use it.
Setup dashboard. One editor window shows what's missing and fixes it with a button.
No extra SDK download. Uses the Steamworks SDK that ships with Unreal Engine.
Pick only what you need. Each feature is its own module.

Tested on Windows. macOS and Linux are experimental. Project status

On Fab

Plugin catalogue

Gameplay, AI, networking, audio and performance systems, available on the Fab marketplace.

GameplayMultiplayerv1.0.0

Power-Ups System

A flexible framework for creating, applying and persisting power-up effects in singleplayer and multiplayer, whether you're building a fast-paced shooter, a puzzle adventure or a stylised RPG.
GameplayMultiplayerv1.0.0

Modular Puzzle System

Design smarter puzzles and dynamic interactions. Build intricate, reusable and network-ready puzzle systems with flexibility and scalability.
GameplayMultiplayerv1.0.0

Card Game Interface

A robust foundation for collectible card games (CCGs), trading card games (TCGs) or any card-based game, for both singleplayer and multiplayer.
AIC++ & Blueprintsv1.0.1

AIBrain

A framework for advanced AI behaviour built on Unreal's StateTree. Adds systems and components for perception, communication, decision-making and coordination, all usable from both C++ and Blueprints.
GameplayMultiplayerv1.1.0

Adaptive Scare System

Heighten the horror experience in singleplayer and multiplayer by controlling scare events based on states you create in Blueprint.
Audiov1.0.3

Conductor: Music System

Simplifies music management by combining Unreal's audio system with Quartz. Get precise control over music tracks and trigger events from them for a dynamic, synchronised experience.
Performancev1.1.1

Significance Manager: Bucket System

A bucket system integrated with the Significance Manager that reduces scene complexity, helping games with many players or AI characters hit their frame-rate targets.
Networkingv1.1.1

Network Lerp Movement

Lerping actors with Unreal's built-in Replicate Movement can jitter, especially under high latency. This plugin uses local prediction for smooth, reliable interpolation. No more jitter.
Networkingv1.1.1

Network Spline Movement

Move actors along splines without replication jitter. Local prediction keeps movement smooth in both normal and high-latency conditions.

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