Best Open-Source Game Engines 2026: 7 Options Compared

Picking an open-source game engine is mostly a choice between an editor and a codebase. Godot and GDevelop give you a visual editor, scene tools and export buttons, so a beginner can have a prototype running in an evening. Bevy, Stride, O3DE and LOVE hand you a programming environment instead: you write Rust, C# or Lua and assemble the pieces yourself, which suits programmers who find editors slow. Phaser sits in its own corner as a framework for 2D games that run in a web page. The license matters less than people fear, because every engine here is permissive (MIT, zlib, Apache) so there are no royalties or revenue shares, but check the details for the editor and the engine separately if you plan to sell a game. The real trade-off is maturity against scope. Godot has the largest community and the most tutorials; O3DE and Stride aim at high-end 3D but have smaller user bases and fewer answers when you are stuck. Look at your target platforms first, since console export usually needs third-party help in any open engine. This list covers seven engines, each with its license and the kind of project it fits, so you can match a tool to the game you actually plan to ship rather than the one with the loudest fans.

Godot Engine

The most complete open-source editor here, with 2D and 3D, a scripting language and one-click export. MIT licensed with no royalties; console ports need third-party help.

Price: Free (Free and open source; the license page says you are free to use the engine for any purpose) (Godot Engine pricing, checked 2026-10-22).

Platforms and license: Windows, macOS, Linux. MIT (open source) (license source).

Best for: First game in 2D or 3D.

GDevelop

No-code event system under an MIT engine, so you can build without writing code. The free hosted plan limits cloud projects, daily exports and AI credits.

Price: Free (Free plan: 3 cloud projects, 40 AI credits per month, 1 desktop publishing per day, 1 Google Play publishing per day, 2 days of version history, 3 player feedback per game, 1 leaderboard per game, multiplayer 1 lobby up to 4 players) (GDevelop pricing, checked 2026-10-23).

Platforms and license: Windows, macOS, Linux. MIT (open source) (license source).

Project activity: 28.1k GitHub stars · latest release v5.6.285 (Oct 21, 2026) · last commit Oct 27, 2026

Best for: Non-programmers and quick 2D prototypes.

Bevy

A code-first Rust engine with an entity-component design, MIT or Apache-2.0 at your choice. There is no visual editor, so expect to write and compile everything.

Price: Free (100% free, per bevy.org ('Free and Open Source Forever')) (Bevy pricing, checked 2026-10-22).

Platforms and license: Windows, macOS, Linux. MIT or Apache-2.0 (open source) (license source).

Project activity: 49.3k GitHub stars · latest release v0.20.0 (Oct 8, 2026) · last commit Oct 27, 2026

Best for: Rust developers who want full control.

LÖVE

A small Lua framework under the zlib license for 2D games. No editor or scene tools; you get drawing, audio and input and build the rest yourself.

Price: Free (Costs nothing, per the homepage) (LÖVE pricing, checked 2026-10-23).

Platforms and license: Windows, macOS, Linux. zlib/libpng (open source) (license source).

Project activity: 8.9k GitHub stars · latest release 11.5 (Dec 3, 2023) · last commit Oct 26, 2026

Best for: Programmers who want a light 2D toolkit.

Stride

A C# 3D engine with an editor, MIT licensed. The repository does not give a full platform list, and the community is smaller than Godot's.

Price: Free (Free and open source) (Stride pricing, checked 2026-10-24).

Platforms and license: Desktop. MIT (open source) (license source).

Project activity: 7.9k GitHub stars · latest release releases/4.4.1 (Oct 17, 2026) · last commit Oct 26, 2026

Best for: C# developers making 3D games.

Worth knowing: C# engine with a visual Game Studio editor, focused on realistic rendering and VR per the README.

Open 3D Engine (O3DE)

Apache-2.0 engine from the Open 3D Foundation aimed at AAA-style 3D, with heavier tooling. The repository lists only Windows build requirements.

Price: Free (Free and open source) (Open 3D Engine (O3DE) pricing, checked 2026-10-24).

Platforms and license: Windows, Linux. Apache-2.0 or MIT (your choice) (open source) (license source).

Project activity: 9.8k GitHub stars · latest release 2605.0 (May 27, 2026) · last commit Oct 27, 2026

Best for: Teams that need a large 3D engine.

Worth knowing: LICENSE.txt: Apache 2.0 by default, MIT at your option. README build steps cover Windows and Linux.

Phaser

MIT-licensed JavaScript framework for 2D games that run in desktop and mobile browsers. It is a code library, not an editor.

Price: Free (Free 2D HTML5 game framework under the MIT license) (Phaser pricing, checked 2026-10-24).

Platforms and license: Web browser. MIT (open source) (license source).

Project activity: 40.6k GitHub stars · latest release v4.2.1 (Jul 9, 2026) · last commit Aug 21, 2026

Best for: Web and HTML5 games.

Worth knowing: A code framework for browser games rather than a visual editor.

Which one to pick

• You want an editor and the biggest community: Godot Engine
• You do not want to code at all: GDevelop
• You write Rust and like data-oriented design: Bevy
• You are building a game for the browser: Phaser
• You want C# and a 3D editor: Stride