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Free Unity Assets Mega List

AI

  • Behavior Bricks : Behavior Bricks is a state-of-the-art engine for Behavior Trees (BTs) along with an intuitive visual editor.
  • Crystal AI : A Utility based AI for C# and Unity.
  • Goap : Goal oriented action planning AI in Unity.
  • Panda BT Free : Panda BT is a script-based Behaviour Tree engine which allows the authoring of complex, scaleable and reusable logic for your game.
  • TopDown AI : This is an example of Top Down Shooter AI.
  • RAIN AI for Unity : An incredibly powerful path finding and behavior tree based AI plugin for Unity.
  • Unity Movement AI : A library of steering behaviors to help your NPCs move around your game.

Analytics

  • Google Analytics Plugin : Allows game developers to easily implement Google Analytics in their Unity games on all platforms.

Animation

Audio

  • InAudio 2 : Add great audio to your game in seconds with the new layered music player with crossfading and gap-less transitions.
  • Reaktion : An audio reactive animation toolkit for Unity.

Cameras

  • EZ Camera Shake : A versatile implementation of procedural camera-shaking animation.
  • GhostFreeRoamCamera : Free flying ghost roaming camera, in a FPS style!
  • RTS camera : Best free camera asset on the Unity asset store.

Controllers

Database

Debugging

Development / Testing

  • Log Viewer : Check editor console logs inside the game itself even on mobile.
  • Resource Checker : Shows how much memory textures take to reduce memory usage.
  • ShaderlabVS : Visual Studio Plugin for Unity Shaderlab programming.
  • Unity Test Tools : Test your game with unit test framework, integration test framework, assertion component, ide, batch and test mode runners.
  • VSCode : Seamless support for Microsoft Visual Studio Code in Unity.

Editor Extensions

  • Inspector Gadgets Lite : Streamline your editor experience with this enhanced Transform Inspector.
  • Weaver Lite : Directly reference assets and layers in your code without any magic strings and generate procedural assets in the Unity Editor.

Fog

Frameworks

  • Entitas : The entity component framework for Unity. Entities, pools, groups, observers.
  • Facepunch.Steamworks : A wrapper for Steamworks recommended by the community.
  • SteamWorks : A C# Wrapper for Valve's Steamworks API, it can be used either with Unity or your C# based application.
  • uFrame ECS Pro : A visual architecture and visual scripting tool based on the industry vetted entity-component-system. It has a very familiar feel to that of Unreal's blue-prints.
  • uFrame Game Framework : An MVVM/MV* framework designed for the Unity Engine. It comes with a load of features including a graphing/diagramming engine that will generate code and even process some re-factoring.
  • UniRx : A re-implementation of the .NET Reactive Extensions for Unity.
  • UnitySteer : Awesome autonomous agent steering framework for Unity.
  • Universe : A global persistent game manager that lasts across screens.
  • Weaver Lite : Directly reference assets and layers in your code without any magic strings and generate procedural assets in the Unity Editor.
  • Zenject : Awesome looking dependency injection / IOC framework.

Game Toolkit

  • Fungus : Easy, branching story editor. Was used in a Unity presentation some time ago.

Input Management

  • InputBinder : Makes it easy for components to respond to axis, button, and key input events.
  • Lean Touch : Multi-platform input library for gestures (both touch and mouse).
  • LeapMotion : Leap motion development page and downloads.
  • TouchKit : TouchKit aims to make touch handling in Unity more sane.
  • TouchScript : TouchScript is a multi-touch library for Unity. Makes handling complex gesture interactions on touch surfaces easier.

Inventory Management

  • Inventory System : The Inventory System & Editor Extension is a complete Inventory, Item and Character Sheet solution providing loads of neatly organized and documented parameters allowing full customization of UI as well as gameplay features with little to no coding.

Languages

  • Arcadia : Clojure for Unity.
  • MoonSharp : Community recommended Lua interpreter written in C# for maximum compatibility.
  • UniLua : Implementation of LUA for Unity.

Lighting

Localization

Meshes

Music & Sound

Networking

  • Photon Unity Networking Free : Easily add multiplayer to your games and launch them globally with the included FREE Photon Cloud plan.
  • Unity HTTP : A TcpClient-based HTTP library for Unity.

Noise

  • LibNoise : A port of the LibNoise framework for Unity. Great if you are doing procedural content generation.

Particle Systems

Pathfinding

Pooling

  • ObjectPool : This script reduces garbage collection and therefore jitter by pooling instances.
  • RecyclerKit - An object pooling system that is super easy to use from Prime31.

Post FX / Shaders

  • Deferred Night Vision : AAA quality night vision effect if you're using deferred rendering.
  • KinoGlitch : A collection of glitch video effects.
  • KvantSpray : GPU accelerated object instancing/particle animation system for Unity. Very cool!
  • Legacy Unity Cinematic Image Effects : Awesome Post FX. If using 5.5 and up use the Unity Post Processing Stack above instead.
  • Legacy Image Effects : This package contains the Image Effects previously shipped as part of Unity's Standard Assets.
  • Lightning Bolt Effect for Unity : Customizable lightning asset.
  • Lux : Fantastic open source physically based shader framework for unity.
  • Melee Weapon Trail : Add "swoosh" trail effects suitable for attacks of your characters.
  • Post Processing Stack : Amazing Free and Fast Post Processing Stack from Unity. Must have for Unity 5.5 and up!
  • Shader Case Study - Pokemon Battle Transitions : Video tutorial plus shaders.
  • ShaderProject : All sorts of handy shaders - ApplyTexture, Blending, AdditiveBlending, AlphaBlending, CombineTextures, Dissolve, DiscardingFragments, FlatColor, FlatRGBColor, GeometryShaders, GrabPass, BlackWhite, Blur, GlassStained, Pixelation, PixelShifting, Tint, Zoom, Masks, AlphaMask, ColorMask, ColorAlphaMask, NormalExtrusion, NormalMapping, PostProcessing, BlackWhite, BlendModes, BrightnessSaturationContrast, DepthTexture, Overlay, Pixelation, Tint, RotationUV, RotationVertices, Shading, Diffuse, DiffuseLighting, Phong, Phong-Blinn, Silhuette, StencilBuffer, TextureAtlas, ToonShading, VertexManipulation, Flag, Scale, VolumetricExplosion, Water, Waves
  • SMAA for Unity3D : Subpixel Morphological Antialiasing for Unity3D.
  • Temporal Reprojection Anti-Aliasing : TRAA for Unity.
  • Toon Shader Free : A free toon shader - render your 3d models in a toon style.
  • Unity 5 Effects : Temporal screen space reflections, screen space shadows, screen space boolean, rim light, water surface and caustics, light particles, procedural modelling, metaball, temporal SSAO, mosaic field.
  • UnityPCSS : Implementation of NVidia "PCSS" or "Percentage Closer Soft Shadows".

Roads

  • EasyRoads3D Free : The free version of what is probably the best roads asset for Unity. Works well with with Gaia terrains.
  • Simple Modular Street Kit : Snap together these assets to create roads in unity.

Scene & Art Creation

Serialization

  • FullSerializer : Easy to use and robust JSON serializer that just works.

###Skies

Spawning

Terrain

Text

Texture

Thread Management

Tweening Libraries

  • DOTween (HOTween v2) : A very nice tweening library optimised for C# and nicely integrated into Unity.
  • LeanTween : An efficient tween engine for Unity that offers a many features.
  • iTween PAID : Tweening for moving 3d objects

Tutorials (also a great source of free assets)

  • Adam Exterior Environment : The Exterior environment from the Adam demo.
  • Adventure - Sample Game : Explore the makings of a point-and-click adventure game, complete with simple inventory system and data persistence examples with this fully-commented complete project, as used to teach Unite 2016's Training Day.
  • Space Shooter Tutorial : Space Shooter tutorial Project on Unity's Tutorial area.
  • Tanks Tutorial : This 2 player 1 keyboard couch warfest sees you building a complete tank shooter from scratch.
  • The Blacksmith Environments : All environment assets from “The Blacksmith” short film.
  • Vehicle Tools : Sample project tools to rig wheeled vehicles and easily create suspension for physics-based wheel colliders.
  • 2D Platformer : Showcasing 2D features a platform shooter demo.
  • 2D Roguelike : Learn how to make a 2D Roguelike game.

UI

Utilities

  • Autosaver : Editor extension that allows for auto-saving your work.
  • BitStrap : A bunch of handy utilities that allow you to bootstrap a new Unity project.
  • Door Manager Script : A handy script to open and close doors in game.
  • FrameCapturer : Captures frames to pictures and videos. Supports png, gif, mp4, exr.
  • Instant Screenshot : Handy screen shot taking system.
  • Klak : Noise, random numbers, interpolation, extensions, image writer, procedural motion, event wiring.
  • LINQ to Game Object for Unity : Traverse GameObject Hierarchy by LINQ.
  • More Effective Coroutines : Memory Efficient Coroutines is an improved implementation of the standard co routines that runs blazing fast and has zero per-frame memory allocations.
  • Random Duplicate : A utility to duplicate an object with random size and rotation.
  • Previously Paid : A collection of previosly commercial unity assets.
  • Secured PlayerPrefs : Encrypt/decrypt PlayerPrefs.
  • Simple Finite State Machine : State machine designed with simplicity and ease of use in mind.
  • Tiny Lab Productions Library : Awesome collection of utilities. Android utils, bitmap, promises, futures, co-routine helpers, alloc free iterators, extensions, json parser / emitter, oprion, lazy, tupe, try, unit and many more useful utilities. Well worth a look!
  • Unity Color Picker : A color picker for Unity.
  • Unity3D-ComponentAttribute : An attribute that let's you auto-load components.
  • Unity Toolbag : A bunch of handy Unity extension utilities. Very handy.
  • Zone Controller Free : Allows you to control the properties of ANY other Unity component at runtime. Create stunning and smooth transition effects on your favorite Unity components with just a few clicks. Very powerful!

Virtual Reality

  • Google VR SDK for Unity : Build virtual reality applications for Android and iOS using the Google VR SDK for Unity.
  • HoloToolkit-Unity : A collection of scripts and components to accelerate development of applications targeting Windows Holographic.
  • Project Tango UnitySDK Examples : the Project Tango UnitySDK examples and tutorial projects for Unity 5 and above.
  • SteamVR Plugin : The Steam VR plugin for Unity.
  • Steam VR Unity Toolkit : A collection of useful scripts and prefabs for building SteamVR titles in Unity 5.
  • The Lab Renderer : The scripts and shaders that drove rendering in The Lab for HTC Vive. Forward renderer with support for up to 18 dynamic shadowing lights in a single pass with MSAA enabled, and it included the Adaptive Quality system that dynamically adjusts rendering resolution to maintain framerate in VR.
  • Newton VR : A virtual reality interaction system for unity based on physics.
  • VRTK : Virtual reality scripting toolkit, a collection of useful scripts and prefabs for building VR titles in Unity 5.
  • VR Samples : VR Samples from Unity.

Visual Scripting

  • Behavior Bricks : Behavior Bricks is a state-of-the-art engine for Behavior Trees (BTs) along with an intuitive visual editor.
  • Panda BT Free : Panda BT is a script-based Behaviour Tree engine which allows the authoring of complex, scaleable and reusable logic for your game.
  • uScript Personal Learning Edition : uScript is a fully featured visual scripting system developed by industry veterans of award-winning "AAA" games.

Weather

2D Assets

3D Models

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