Unity Alternatives for 2D, 3D and Mobile Game Development

Unity still works, and its most hated policy is gone. Unity cancelled the Runtime Fee on September 12, 2024, a year after announcing it. The Unity plan comparison lists Personal as free for gaming and entertainment projects, Pro at $210 per seat per month or from $2,310 a year, and Enterprise as required above $25 million in annual revenue. Unity 6.3 is the current long-term support release, supported until December 2027, and the splash screen is optional on Personal since Unity 6.

People still leave. Some lost trust in 2023 and want an engine whose licence cannot change under them. Others want lighter builds for web or mobile, or do not want per-seat fees once revenue passes $200,000. Our Godot alternatives page covers the same field from the other side. The eight engines below are ordered by how little a Unity developer has to relearn.

Prices below are as of November 8, 2026. Our method is on How we review tools.

Quick comparison

Godot

Godot is where most Unity refugees landed after 2023, and its node-and-scene model maps well onto GameObjects and prefabs. The Godot download page lists 4.7.2, dated August 18, 2026, with editors for Windows, macOS, Linux, Android and the web. A separate .NET build runs C# scripts, so existing gameplay code can often be ported instead of rewritten.

The engine is MIT licensed with no royalties, no seat fees and no splash screen. The whole download is small enough to keep in a project repository, and GDScript, its own Python-like language, is quick to learn for designers who never touched C#.

Best for: Indie teams moving 2D or mid-range 3D projects from Unity who want zero licence risk.

Pricing:

• Free for any use, MIT licence
• No royalties, seats or revenue caps

Watch out for:

• Console exports are not built in. The Godot console docs say ports go through third-party porting companies because console SDKs are under NDA.
• Digital store versions of the editor ship without C# support, so a team porting C# code has to use the separate .NET build and install the .NET SDK.

Official site: Godot. Our listing: Godot.

Unreal Engine

Unreal is the move for teams whose Unity project was fighting the renderer. Lumen, Nanite and MegaLights give high-end lighting and geometry out of the box, and Blueprints let designers script without C++. Unreal Engine 5.8 launched in June 2026, and full engine source is available on GitHub to licensees.

The Unreal licence page sets a 5% royalty on a game's lifetime gross revenue above $1 million, and sales through the Epic Games Store are royalty-free. Below that threshold it costs nothing, and there are no seat fees for game developers.

Best for: Studios making 3D PC and console games where visual quality matters more than build size.

Pricing:

• Games: free until $1 million lifetime gross per product, then 5% royalty
• Epic Games Store sales: royalty-free
• Non-game use: $1,850 per seat per year for companies above $1 million revenue

Watch out for:

• Mobile and small 2D games carry a lot of engine weight. Empty Unreal builds are far larger than Unity, Godot or Defold builds, and C++ compile times slow iteration.

Official site: Unreal Engine.

Stride

Stride, formerly Xenko, is a 3D engine written in C# with a Unity-like editor called Game Studio: scene tree, entity components, prefabs and an asset browser. For a C# programmer it is the least foreign engine on this page. Stride 4.3 moved to .NET 10 in November 2025, and the Stride blog announced 4.4 on October 9, 2026 with a modernised shader pipeline and reworked Vulkan and Direct3D back ends.

It is MIT licensed and run by a volunteer community under the .NET Foundation, with no company that could change the terms. VR support is built in.

Best for: C# developers who want a free 3D engine with an editor that feels like Unity's.

Pricing:

• Free, MIT licence
• No royalties or fees

Watch out for:

• The editor runs on Windows only. Linux and macOS users can write code and build games with a community toolkit, but not use Game Studio natively.
• The asset store, tutorials and third-party plugins are a small fraction of Unity's, so expect to build more tooling yourself.

Official site: Stride.

Cocos

Cocos, long sold as Cocos Creator, is a TypeScript engine with a strong hold on Chinese mobile games, HTML5 and mini-game platforms such as WeChat. SUD acquired it for $72 million in November 2025, and in January 2026 released COCOS 4 with every commercial restriction removed under the MIT licence, per It's FOSS.

For Unity developers it is the closest match in the web and casual space: component-based scenes, a visual editor and small builds that load fast in a browser. COCOS 4 stays forward compatible with Cocos Creator 3.x projects.

Best for: Teams shipping casual and hyper-casual games to web, mobile and mini-game platforms.

Pricing:

• Free, MIT licence since COCOS 4
• No royalties

Watch out for:

• The tooling is in transition. COCOS 4 splits the engine from the editor, now a separate IDE called PinK, and visual editing features move there over time, so tutorials and the editor may not match.

Official site: Cocos.

GameMaker

GameMaker is built only for 2D, and that focus is why many solo developers prefer it to Unity's 2D tools. Rooms, sprites, tile sets and a simple scripting language called GML get a platformer running within an afternoon, and it has shipped hits like Undertale and Hyper Light Drifter.

The GameMaker plans page keeps pricing simple: Free for non-commercial use with desktop, web and mobile export, and Professional at $99.99 once for a commercial licence.

Best for: Solo developers and small teams making 2D games who want to ship quickly.

Pricing:

• Free: non-commercial use, desktop, web and mobile export
• Professional: $99.99 one-time, commercial licence
• Enterprise: monthly or yearly subscription with console export, price not published

Watch out for:

• 3D is effectively out of scope, and console export needs the Enterprise subscription, whose price is not published.

Official site: GameMaker.

Defold

Defold is a Lua engine from the Defold Foundation, first released by King. It is known for tiny builds and fast startup, which matter for mobile ad-driven games and the web. The Defold site lists exports for iOS, Android, HTML5, Windows, macOS, Linux, Steam, Switch, PS4, PS5 and Xbox, with Xbox added in 1.14.0 in October 2026.

Console exports are free for approved platform developers, which is unusual. The editor includes hot reload, a profiler and a debugger.

Best for: 2D mobile and web games where download size and load time drive revenue.

Pricing:

• Free, no royalties or runtime fees
• Console exports free for approved developers

Watch out for:

• Lua and a message-passing architecture feel very different from Unity's C# components, and 3D support is basic.
• The Defold License is not OSI open source. It bans selling the engine itself as a game engine product.

Official site: Defold.

Flax Engine

Flax mixes a Unity-style editor and C# scripting with a C++ core and Unreal-style rendering. Full source is on GitHub, and the editor builds on Windows, Linux and Mac.

Its licensing page charges nothing for non-commercial and educational use, and 4% of earnings only above $250,000 per calendar quarter. That threshold is high enough that most indie games never pay.

Best for: C# developers who want better 3D rendering than Unity's built-in pipeline without learning Unreal.

Pricing:

• Free for non-commercial and educational use
• 4% royalty on earnings above $250,000 per calendar quarter
• Custom per-seat or flat-fee terms for non-game use

Watch out for:

• It is a small project with a small community, and console platform code is excluded from the public source because of NDAs.

Official site: Flax Engine.

Bevy

Bevy is a data-driven engine written in Rust around an entity component system, so it suits programmers who liked Unity DOTS more than MonoBehaviours. Releases come every few months: 0.18 in January 2026, 0.19 in June and 0.20 on October 8, 2026, per Bevy news.

It is free and open source with no royalties, and everything, from rendering to input, is a replaceable plugin.

Best for: Programmers who want a code-first engine in Rust and do not need a visual editor.

Pricing:

• Free and open source, no royalties

Watch out for:

• There is no finished editor yet. The 0.20 notes describe building blocks for a scene editor, and each release ships a migration guide because APIs still break.

Official site: Bevy.

How to choose

When to stay with Unity

Stay on Unity if you ship mobile games with ads and in-app purchases, need console exports without porting houses, or depend on Asset Store packages. No engine here has its mix of platform reach, services and hiring pool. Personal is free up to $200,000 in revenue and funding, and the pricing update page confirms the Runtime Fee is gone, so the main reason many studios left no longer applies.

Frequently asked questions