Impact.js

Spec sheet

What it does

Impact is a JavaScript game engine for developing HTML5 games for desktop and mobile browsers.Read 11 Oct 2026 · impactjs.com

Free plan

YesRead 24 Sep 2026 · impactjs.com

Integrations

The Ejecta page lists Game Center, gamepad, in-app purchases, iAds and image picker integrations or APIs.Read 11 Oct 2026 · impactjs.com

Support

The maker directs programming questions to the forums and IRC channel, and says forum questions are often answered faster than email.Read 11 Oct 2026 · impactjs.com

2D level editor

Impact includes Weltmeister, a level editor for creating 2D game worlds and connecting entities into logic chains.Read 11 Oct 2026 · impactjs.com

Browser support

The site says Impact runs in HTML5 capable browsers, including Firefox, Chrome, Safari, Opera and Internet Explorer 9.Read 11 Oct 2026 · impactjs.com

Console export

YesRead 24 Sep 2026 · impactjs.com

Core capabilities

The documentation covers entities, animation, tile maps, collision maps, keyboard and mouse input, sound and music.Read 11 Oct 2026 · impactjs.com

Current release listed

The download page lists Impact Version 1.24 as the current release, dated 2014-07-28.Read 11 Oct 2026 · impactjs.com

Debugging

Impact includes a debug menu for finding performance bottlenecks and inspecting a game while it runs.Read 11 Oct 2026 · impactjs.com

Maintenance and release

The blog says the last Impact update was published in 2014 and that the engine was made free under the MIT License in 2018.Read 11 Oct 2026 · impactjs.com

Mobile constraints

The mobile documentation describes performance, resolution and audio limitations, including that mobile platforms may only play one HTML5 sound at a time on iOS.Read 11 Oct 2026 · impactjs.com

Mobile export

YesRead 24 Sep 2026 · impactjs.com

Mobile publishing

The maker says the Ejecta framework can package HTML5 games for the iPhone App Store with multitouch and sound support.Read 11 Oct 2026 · impactjs.com

Scripting languages

JavaScriptRead 24 Sep 2026 · impactjs.com

Security and compliance

The maker’s opened pages do not state security or compliance certifications.Read 11 Oct 2026 · impactjs.com

Source code model

open_sourceRead 24 Sep 2026 · impactjs.com

Support forum status

The Impact forums are read-only and serve as an archive; the page directs questions to GitHub.Read 11 Oct 2026 · impactjs.com

Target platforms

web,iOS,Android,tvOSRead 24 Sep 2026 · impactjs.com

Plans and prices

Every Impact.js plan and price →

Where Specifiction places it

• Game Engine Software#63 of 927.9