Unreal Engine 3 runs native in your browser

You may be able to run Unreal Engine 3 in your browser right this moment, with no installation. Epic Games and Mozilla have collaborated on a native port of the engine's Citadel tech demo to JavaScript, OpenGL, and HTML5.

You can find the the demo right here; keep in mind you'll likely need Firefox's nightly build to run it. Feel free to try playing elsewhere, but it crashed when we used Chrome.

Most browser games require some extra finaggling with plugins or add-ons, and some even launch a separate program. Citadel doesn't have the visual firepower of the Infiltrator Unreal Engine 4 demo, but it gives us a lot of hope for the future of easy, accessible, browser-native gaming.

The video below shows HTML5 Citadel if you can't get it to load, as well as some browser-based Unreal Tournament III gameplay.


  • awesomesauce - May 2, 2013 9:01 p.m.

    This is "Unreal"!
  • winner2 - May 3, 2013 8:49 a.m.

  • taokaka - May 2, 2013 4:03 p.m.

    Very misleading title, I was expecting to see an unreal engine demo for my beloved internet explorer 6, the one and only web browser in my eyes. I am very upset about this websites detestable trolling, I was looking forward to being able to experience the once in a lifetime event of experiencing the very underrated and underused unreal engine 3 but without support for IE6 I'll probably just cry myself to sleep.
  • haxxoromg - May 2, 2013 6:14 p.m.

    this must be the first time the word "beloved" has ever been used to describe internet explorer, even if it's solely for trolling purposes
  • Child Of Death - May 2, 2013 6:28 p.m.

    I really hope you are just joking. Internet Explorer is a archaic piece of shit.
  • mafyooz - May 7, 2013 1:35 a.m.

    Back to trying to win the Week Of Hate again eh?
  • Bloodstorm - May 2, 2013 3:48 p.m.

    So now the question is, where won't Unreal Engine run?
  • g1rldraco7 - May 2, 2013 3:04 p.m.

    Sorry, my laptop runs on Google Chrome since it thinks Mozilla i a virus.

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