Game engines compared
Every tool below can ship a finished game. What separates them is the language you write in, the licence you agree to, whether the result runs in a browser, and how much of the work is done for you before you start.
| Engine | Type | Language | Licence | 2D / 3D | Runs in browser | Best for |
|---|---|---|---|---|---|---|
| Three.js | Library | JavaScript | MIT Open source | 3D | Yes | Web developers comfortable in JavaScript who want interactive 3D on a page and are happy to assemble gameplay, physics and audio themselves. |
| PixiJS | Library | JavaScript, TypeScript | MIT Open source | 2D | Yes | JavaScript and TypeScript developers who want raw rendering speed and are happy to wire up gameplay, input and physics themselves. |
| KAPLAY | Library | JavaScript, TypeScript | MIT Open source | 2D | Yes | Web developers who want to make a small 2D game fast, jam entrants working to a clock, and anyone teaching game programming where the whole thing needs to fit in a beginner's head. |
How to choose a game engine
Choosing an engine is mostly an exercise in narrowing. Almost any tool on this page can produce the game you have in mind; the question is which one gets you to a playable build fastest without boxing you in later. The columns above are the four constraints that matter most early on, and they are worth thinking about in order.
Start with the language you already know
The primary language is the single biggest predictor of how quickly you will be productive. Learning a new engine while also learning a new language doubles the difficulty, and the difficulty compounds: when something breaks, you will not know whether the bug is in your understanding of the tool or your understanding of the syntax. If you already write in one of the languages listed, that is a real head start and it is worth weighting heavily. If you are starting from nothing, prefer whichever language has the larger body of tutorials for the kind of game you want to make, because your first hundred questions have almost certainly been asked before.
Read the licence before you write any code
The licence column is not a formality. Open-source tools give you the source, the right to modify it and no commercial gate — the cost is that support is community-driven and the roadmap is not yours to direct. Free but closed-source tools remove the price without giving you the source, which is fine until you hit a bug in the runtime you cannot fix yourself. Commercial tools charge, in one form or another, and the terms are the ones most likely to change over the life of a project. Mixed licensing usually means a permissive core with paid or restricted components layered on top, so check which half your intended use falls into.
Whatever the licence family says here, the specific terms live on the vendor's own site and they are the only version that binds you. We deliberately do not restate prices, revenue thresholds or seat limits on these pages, because those change and a stale number is worse than none. Every engine page links straight to the official site for exactly this reason.
Decide whether 2D or 3D is the real requirement
Tools that do both rarely do both equally well. An engine built around a 3D scene graph can render a 2D game, but you may find yourself fighting cameras, lighting and units that were designed for a world with depth. The reverse is more absolute: a 2D-only tool will not grow a third dimension later. Be honest about which one your game actually needs rather than which one leaves more doors open, because the door you keep open is one you will probably never walk through, and you will pay for it in day-to-day friction.
Check whether it runs in a browser
Browser export is the difference between a player clicking a link and a player deciding whether to trust a download. If you want people to try your game on a whim — in a game jam, from a social post, on a portfolio page — a tool that exports to the web is not a nice-to- have, it is the distribution channel. Use the browser filter above to see only the tools that can do it. Bear in mind that browser builds are usually the most constrained target: memory is tighter, load times are visible to the player, and some native features simply are not available. An engine that can export to the web will still need you to design within those limits.
Engine, framework or library?
The type column separates three different amounts of scaffolding. An engine typically brings an editor, a scene system, an asset pipeline and a build process — a great deal is decided for you, which is exactly the appeal and exactly the constraint. A framework gives you the structural pieces without the editor: you write the game loop and wire things together in code, trading convenience for control. A library solves one problem well — rendering, physics, audio — and expects you to assemble the rest yourself. Beginners and small teams with deadlines are usually better served by more scaffolding; developers with a specific technical vision, or a game that does not resemble anything an editor was designed for, tend to prefer less.
Then stop comparing and build something
The most common mistake is spending weeks evaluating tools and no time making a game. Every option here has shipped finished, commercially released titles, which means none of them is the reason a project fails. Pick the one that clears your hard constraints — language, licence, dimension, browser support — and build the smallest complete thing you can: one level, one mechanic, a start screen and an end screen. You will learn more about whether a tool suits you in that first week than from any comparison table, including this one. If it turns out to be the wrong fit, you will have lost a week rather than a year, and you will know precisely what you actually need from the next one.