A curated collection of open-source Unreal Engine tools, plugins, games, tutorials, assets, and research.
- Open-source Unreal plugins — Installable and reusable third-party Unreal Engine plugins and modules.
- Open-source Unreal games and projects — Playable games, complete projects, templates, and learning samples.
- Unreal AI, Agent, MCP, and automation tools — AI assistants, agent skills, MCP integrations, and generative workflows for Unreal.
Want to prototype a native Unreal game faster? Seele Agent from SeeleAI turns a natural-language idea into an editable Unreal Engine 5 project in the browser.
- 🧠 Describe a genre, scene, mechanic, or visual direction in plain language, then use an AI-generated starter prompt to shape the project.
- 🏗️ Generate a native
.uprojectwith project files, gameplay, camera, controls, environment, and visual direction instead of a non-Unreal mockup. - 🔍 Review the running game in the browser through Pixel Streaming, iterate on the prompt, and inspect the result before moving deeper into development.
- 🚀 Continue in Unreal Editor for Blueprint, C++, asset, platform, and engine-level customization, then package, download, or publish the result.
Try SeeleAI Unreal Game Creator when you want to move from an idea to a playable Unreal prototype quickly.
★ Star counts checked on 2026-08-29; they may change over time.
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VibeUE · ★ 638 · MIT · UE5.8+
An Unreal Engine vibe-coding tool that combines MCP-based editor control with an AI-assisted development workflow. It is a good entry point for exploring natural-language interaction with the editor, project context, and everyday prototyping tasks.
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unreal-engine-skills · ★ 325 · MIT · UE5
A structured set of 27 Unreal C++ skills covering gameplay, rendering, networking, animation, and more. It works with Claude Code, Cursor, Windsurf, and other agents that support the Agent Skills specification, making it useful for repeatable engine-aware coding assistance.
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UnrealClaude · ★ 890 · MIT (README badge) · UE5.7
Claude Code CLI integration for Unreal Engine 5.7 with built-in UE documentation context available directly in the editor. Use it to evaluate how a coding agent can help inspect, explain, and extend an Unreal project.
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unreal-mcp · ★ 2,067 · MIT (README declaration) · UE5.5+
An MCP server that enables clients such as Cursor, Windsurf, and Claude Desktop to control Unreal Engine through natural language. It is useful for studying the end-to-end shape of an AI-to-editor integration.
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UnrealMCP · ★ 604 · No license file found · UE5
An MCP bridge that allows AI agents to issue operations against Unreal Engine. It is a compact reference for comparing how an agent, an MCP layer, and editor-side commands can be connected.
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UE5-MCP · ★ 424 · MIT template (placeholder) · UE5
An MCP integration for Unreal Engine 5 that focuses on exposing engine operations to an AI client. It is suitable for testing a smaller, focused agent-controlled workflow before adopting a broader toolchain.
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AirSim · ★ 18,427 · MIT · UE4/Unity
Microsoft's open-source simulator for autonomous vehicles, drones, and robotics, using Unreal Engine or Unity for visual simulation. It provides a substantial reference for sensors, vehicle control, virtual environments, and robotics research prototypes.
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UnrealRoboticsLab · ★ 518 · Apache-2.0 · UE5.7+
A high-fidelity open-source robotics simulator that combines Unreal Engine's photorealistic rendering with MuJoCo's precision physics. It is a strong fit for robotics experiments that need both realistic scenes and physics-oriented evaluation.
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UnrealCV · ★ 2,209 · MIT · UE4
A computer-vision bridge connecting Unreal Engine with external vision tools and research workflows. It is useful for generating synthetic visual data, testing perception systems, and building reproducible virtual environments.
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RealtimeMeshComponent · ★ 1,755 · MIT · UE5
An Unreal Engine 5 plugin component for rendering runtime-generated content. It is useful when procedural systems, streaming data, destructible environments, or custom geometry need a reusable runtime mesh pipeline.
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UnrealCLR · ★ 3,310 · MIT · UE4/UE5
Unreal Engine .NET 6 integration for bringing C# and managed-code workflows into an Unreal project. Consider it when evaluating C# gameplay, tooling, or interoperability with the broader .NET ecosystem.
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HoudiniEngineForUnreal · ★ 1,594 · BSD-3-Clause · UE5.6+
Houdini Engine integration for Unreal Engine, connecting Houdini's procedural authoring workflow with Unreal assets and scenes. It is aimed at technical artists and teams building repeatable procedural content pipelines.
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OpenUnrealUtilities · ★ 292 · MIT · UE5
A collection of reusable Unreal utilities for reducing repeated engine-side implementation work. It is worth opening when you want practical helper code and patterns that can be adapted into editor or gameplay tooling.
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UnrealSharp · ★ 1,915 · MIT · UE5
A UE5 C# plugin built around modern .NET and hot reload. It gives teams another route for gameplay and editor tooling when they want to evaluate managed-code workflows alongside C++ and Blueprint.
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Cesium for Unreal · ★ 1,232 · Apache-2.0 · UE5
Brings global 3D Tiles, terrain, imagery, and geospatial coordinates into Unreal. It opens the door to digital twins, mapping, simulation, and location-scale visualization beyond traditional game scenes.
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EpicSurvivalGame · ★ 3,397 · MIT · UE4
A third-person survival sample project organized around common survival-game building blocks. It is useful for examining inventory, interaction, item use, and the way a playable gameplay loop is assembled in Unreal.
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ActionRoguelike · ★ 4,569 · Unreal Engine EULA (game assets) · UE4/UE5
A C++ action roguelike project that demonstrates combat, abilities, AI, items, and multiplayer-oriented gameplay patterns. Open it when you want a code-first example of structuring a compact but complete Unreal gameplay prototype.
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SimpleFPSTemplate · ★ 681 · No license file found · UE4
A compact C++ FPS template with the basic shape of a playable shooter project. It is a practical starting point for learning player input, weapons, targets, maps, and the project structure behind a small Unreal FPS.
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GASPALS · ★ 1,172 · UE-Only Content License · UE5
A UE5 animation sample that combines the Gameplay Ability System with ALS layering. It is useful for studying locomotion, animation layers, and the integration of reusable character systems in a sample project.
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GASDocumentation · ★ 5,933 · MIT · UE4/UE5
A widely used practical guide to Unreal's Gameplay Ability System, accompanied by a simple multiplayer sample. Start here when you need conceptual explanations, implementation notes, and a project that demonstrates GAS in context.
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GASShooter · ★ 1,164 · MIT · UE4
An advanced FPS/TPS sample project built around the Gameplay Ability System. It is useful for seeing how abilities, attributes, effects, weapons, and networked shooter gameplay can be composed in a larger example.
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MassSample · ★ 1,117 · MIT · UE5
A community sample for Unreal's experimental Mass Entity framework. It is a good reference for data-oriented entity processing and for comparing Mass-based gameplay architecture with actor-centric projects.
- Development tools and editor extensions
- Gameplay, networking, GAS, and UI
- Rendering, materials, Niagara, and technical art
- PCG, procedural worlds, and simulation
- Learning resources, samples, and tutorials
- Open assets, research, and community projects
We collect publicly available third-party projects and link back to their original repositories. Each project remains owned by its original author. Check the license, supported Unreal Engine versions, activity, and build instructions before use.
Suggestions and pull requests are welcome. Please include the original project URL, license information, supported Unreal Engine version, and a short reason for inclusion.