Open Source Unity Alternatives for Windows

There are many alternatives to Unity for Windows if you are looking for a replacement. The best open source Windows alternative is Godot Engine. If that doesn't suit you, our users have ranked more than 100 alternatives to Unity and loads of them are open source and available for Windows so hopefully you can find a suitable replacement. Other interesting open source Windows alternatives to Unity are Stride Game Engine, GDevelop, Armory 3D and microStudio.

filter to find the best alternatives

Unity alternatives are mainly Game Development Tools, but if you're looking for Role-playing Games or 3D Modelers you can filter on that. Other popular filters include Windows + Open Source, Linux, Online, Open Source, 3D Game Engine, Free and Android. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Unity.

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Get a badge for your siteUnity alternatives page was last updated Oct 9, 2025

Godot Engine
623 likes
Godot Engine is a feature-packed, cross-platform game engine to create 2D and 3D games from a unified interface. It provides a comprehensive set of common tools, so that users can focus on making games without having to reinvent the wheel.
183 Godot Engine alternatives
Cost / License
Free
Open Source (MIT)
Application type
Game Development
Origin
Argentina
Platforms
Mac
Windows
Linux
Online
Android
Epic Games Store
Flathub
F-Droid
Haiku
Steam
FreeBSD
Flatpak
itch.io
Meta Quest
Argentina
+6
Good alternative?Is Godot Engine a good alternative to Unity?

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20comments
Godot Engine vs Unity Comments
Top Positive Comment by kurifoxen · Sep 21, 2023
Its sopen source with no fees
Positive comment by RemovedUser · Oct 6, 2024
Godot is free, both as in freedom and free of charge. Unity is neither.
Positive comment by Federico Cangiotti · Sep 26, 2023
It's FOSS, lightweight and under intense development, great tool even for beginners.
3 of 20 comments
Godot Engine is Free and Open SourceUnity is Freemium and Proprietary
Godot Engine is LightweightUnity is not according to our users
Stride Game Engine
34 likes
Stride (formerly Xenko) is an open-source C# game engine designed for the future of gaming. It comes with a full toolchain and is especially well suited to create realistic games but allows you much more!.
66 Stride Game Engine alternatives
Cost / License
Free
Open Source (MIT)
Application type
Game Development
Origin
Japan
Platforms
Windows
Japan
+4
Good alternative?Is Stride Game Engine a good alternative to Unity?

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2comments
Stride Game Engine vs Unity Comments
Positive comment by tvgoing1 · Dec 8, 2016
It offers C# and better options for 3D artist.
Positive comment by Guest · Sep 16, 2023
It's more open, I can look under the hood ans see how things work. It's C# all the way down and performance is still great.
2 of 2 comments
Stride Game Engine is Free and Open SourceUnity is Freemium and Proprietary
GDevelop
196 likes
GDevelop is an open-source game making software designed to be used by everyone. Any kind of 2D games can be created with it and no programming skills are required to get started. Logic of games are made using visual events.
125 GDevelop alternatives
Cost / License
Freemium
Open Source
Application type
Game Development
Origin
France
EU
Platforms
Mac
Windows
Linux
Online
Android
iPhone
Android Tablet
iPad
Flathub
France
EU
+4
Good alternative?Is GDevelop a good alternative to Unity?

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4comments
GDevelop vs Unity Comments
Negative comment by Guest · Mar 9, 2018
GDevelop is a 2D game engine based in visual programming and very limited in that aspect.
Negative comment by kayl · Nov 2, 2015
GDevelop --> 2D Unity --> 3D/2D
Negative comment by DeeJayLSP · Jul 17, 2020
GDevelop is more like a Construct alternative than an Unity one.
3 of 4 comments
GDevelop is Freemium and Open SourceUnity is Freemium and Proprietary
GDevelop is LightweightUnity is not according to our users
Armory 3D
33 likes
Armory is an open-source 3D game engine with full Blender integration, turning it into a complete game development tool. The result is a unified workflow from start to finish, making you work faster. No more jumping between different applications.
49 Armory 3D alternatives
Cost / License
Free
Open Source (Zlib)
Application typeApplication types
Game Development
3D Modeler
Platforms
Mac
Windows
Linux
Blender
+4
Good alternative?Is Armory 3D a good alternative to Unity?

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1comment
Armory 3D vs Unity Comments
Positive comment by lemin-creation · Sep 20, 2023
Fully integrated to last builds of Blender 3d, very powerful, and multiplatform ;
1 of 1 comments
Armory 3D is Free and Open SourceUnity is Freemium and Proprietary
microStudio
23 likes
microStudio is a free game engine online. Create games, learn programming, play, share, prototype and jam!.
Cost / License
Free
Open Source (MIT)
Application type
Game Development
Origin
France
EU
Platforms
Mac
Windows
Linux
Online
Raspberry Pi
France
EU
+2
Good alternative?Is microStudio a good alternative to Unity?
Redot Engine
20 likes
Redot Engine is a feature-packed, cross-platform fork of the Godot game engine to create 2D and 3D games from a unified interface. It provides a comprehensive set of common tools, so that users can focus on making games without having to reinvent the wheel.
Cost / License
Free
Open Source (MIT)
Application type
Game Development
Platforms
Mac
Windows
Linux
Good alternative?Is Redot Engine a good alternative to Unity?
UPBGE
12 likes
A extremely powerful application to make games in python as well as in visual programming
135 UPBGE alternatives
Cost / License
Free
Open Source
Application type
Game Development
Platforms
Mac
Windows
Linux
Flathub
Blender
Good alternative?Is UPBGE a good alternative to Unity?

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1comment
UPBGE vs Unity Comments
Positive comment by lemin-creation · Sep 20, 2023
Easy to use. Integrated with EEvee render. Free.Very powerful. All-in-one package solution;
1 of 1 comments
UPBGE is Free and Open SourceUnity is Freemium and Proprietary
Open 3D Engine
26 likes
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D engine that enables developers and content creators to build AAA games, cinema-quality 3D worlds, and high-fidelity simulations without any fees or commercial obligations.
112 Open 3D Engine alternatives
Cost / License
Free
Open Source
Application type
Game Development
Origin
United States
Platforms
Windows
Linux
United States
Good alternative?Is Open 3D Engine a good alternative to Unity?
Bevy Game Engine
24 likes
A refreshingly simple data-driven game engine built in Rust. Free and Open Source Forever!
Cost / License
Free
Open Source (Apache-2.0)
Application type
Game Development
Platforms
Mac
Windows
Linux
Good alternative?Is Bevy Game Engine a good alternative to Unity?
Urho3D
42 likes
Urho3D is a lightweight, cross-platform rendering and game engine implemented in C++ and released under the MIT license. Greatly inspired by OGRE and Horde3D.
Cost / License
Free
Open Source
Application type
Game Development
Origin
Finland
EU
Alerts
Discontinued
Platforms
Mac
Windows
Linux
Android
iPhone
Raspberry Pi
Finland
EU
+3
Good alternative?Is Urho3D a good alternative to Unity?
ct.js
29 likes
ct.js is a 2D game editor (desktop app) based on web technologies. It aims to be an extensible yet simple game-making tool, accessible for both newbies and experienced game developers.
51 ct.js alternatives
Cost / License
Free
Open Source (MIT)
Application type
Game Development
Origin
Russia
Platforms
Mac
Windows
Linux
Russia
+4
Good alternative?Is ct.js a good alternative to Unity?
PlayCanvas
14 likes
PlayCanvas is the world’s easiest to use WebGL Game Engine. It’s free, it’s open source and it’s backed by amazing developer tools.
Cost / License
Freemium
Open Source (MIT)
Application type
Game Development
Origin
United Kingdom
Platforms
Mac
Windows
Linux
Online
Self-Hosted
United Kingdom
+1
Good alternative?Is PlayCanvas a good alternative to Unity?

12 of 71 Unity alternatives

Open Source Unity Alternatives for Windows

Alternatives list

Godot Engine

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Origin

Platforms

Godot Engine vs Unity Comments

Stride Game Engine

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Application type

Origin

Platforms

Stride Game Engine vs Unity Comments

GDevelop

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Origin

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GDevelop vs Unity Comments

Armory 3D

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Armory 3D vs Unity Comments

microStudio

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Origin

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Redot Engine

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UPBGE

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UPBGE vs Unity Comments

Open 3D Engine

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Origin

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Bevy Game Engine

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Platforms

Urho3D

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Origin

Alerts

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ct.js

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Origin

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PlayCanvas

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