mk.js Game Online
mk.js is free and open source (MIT). Original project: github.com/mgechev/mk.js.git
How to Play mk.js
Getting started with mk.js takes seconds. Click inside the game frame to give it keyboard focus, then use the arrow keys (or WASD) to move and the mouse or spacebar to act — exact controls are shown inside the game. If the game saves progress, it is stored locally in your own browser, so you can close the tab and pick up where you left off. Press the fullscreen button for the big-screen experience.
Why Play mk.js?
Zero friction is the biggest one: mk.js runs right here in your browser — no download, no installer, no account, and nothing to pay. Because it is an open-source game (MIT), you get an authentic experience with no ads inside the game, no energy timers, and no upsells. It loads in seconds on any modern device, works alongside other tabs without eating your disk, and you can play it at home, at school or on the go as long as you have a browser.
Key Features of mk.js
- Instant play — the whole game streams into your browser tab in seconds.
- Completely free — open-source (MIT), with no payments or locked features.
- Free to play in your browser — nothing to install, nothing to sign up for.
- Runs anywhere — Chrome, Edge, Firefox and Safari on desktop and mobile.
- Local saves — your progress stays in your own browser's storage.
- Full screen ready — one click switches to an immersive fullscreen view.
How mk.js Works
mk.js is built with web technologies and delivered through this page in an embedded frame. When you press play, your browser downloads the game's code and assets — a few kilobytes to a few megabytes — and runs them locally at full speed. All the processing happens on your own device: input goes straight from your keyboard and mouse to the game, and rendering happens on your GPU. That is why browser games like mk.js start instantly and feel just as responsive as downloaded ones.
Frequently Asked Questions
Is mk.js free to play?
Yes. mk.js is completely free on ArcadeQuokka — no payment, no account and no download required. It is an open-source game released under the MIT license.
Is there anything to install for mk.js?
No. The game runs entirely in your browser tab — open the page and you are playing. Nothing to install, nothing to set up.
What are the controls in mk.js?
The core controls are keyboard movement (WASD or arrow keys) plus mouse aiming where the game supports it — exact bindings are shown inside mk.js itself. Click the game frame first so it has keyboard focus, then the fullscreen button next to it for the big-screen view.
Where is my progress saved?
Locally, in your own browser's storage — nothing is uploaded to a server. One thing to remember: clearing your browser data for this site erases your mk.js saves too.