Arx Fatalis on modern systems through the released source engine.
Arx Fatalis
An Arx Libertatis web demo with local saves and the original interaction scheme.
PlayDemo or your game filesCredits
Arx Fatalis gameplay reference; not a capture of the linked project.
Arx Fatalis game imagery remains copyright its respective rights holders. Publisher-supplied screenshot from the linked official Steam store gallery.
Source & attribution ↗View image ↗About this version
Continuation Labs’ Arxwasm adapts Arx Libertatis to WebAssembly. The hosted demonstration uses the Arx Fatalis demo and does not offer the complete retail adventure.
- Project
- Arxwasm
- Original game
- Arx Fatalis
An underground role-playing world
Arx Fatalis takes place after the sun has failed and its inhabitants have moved underground. Its first-person role-playing combines exploration, conversations, puzzles and character development with weapons, stealth and magic. Spells use drawn runes, making the act of casting part of the game's interaction rather than only a choice from a spell list.
The original game encourages different approaches through character skills and equipment. Those possibilities describe Arx Fatalis as a whole; the browser project's hosted demo supplies a smaller introduction to that world.
Arx Libertatis brought to the web
Arxwasm adapts Arx Libertatis, the open-source engine project for Arx Fatalis, to WebAssembly. The hosted launch uses demo data, with a download of roughly 150 MB that is cached for later visits. It is an engine demonstration you can enter from a browser, rather than a distribution of the full retail game.
Use a current desktop browser for the intended input experience. The creator lists Chrome, Firefox, Safari and Edge; the fact that the engine can run on a mobile device does not supply a playable touch interface.
Switch between looking, fighting and magic
Right-click switches between the cursor and mouse-look. Tab changes combat mode, Ctrl activates magic mode, Enter equips an object and Home opens the menu. Learning those switches helps explain the game's rhythm: interacting with the world, fighting and drawing magic do not all use the same pointer behavior.
Saves use browser storage, so use a normal profile when you want persistent progress. Private browsing can prevent saves from being retained. The cached download and saved progress belong to the browser's local storage, not an automatically synchronized account.
A demo with renderer differences
The creator documents missing effects, including some magic visuals and fog. Keep that in mind when comparing the web demo with native Arx Fatalis or Arx Libertatis. The browser build's presentation and touch limitations are specific to this experiment.
Before you play
Do I need the original game files?
The hosted build uses demo data. Retail content is separate.
Creator-reported · Project guideHow do I get started?
Open the demo in a desktop browser with IndexedDB storage enabled and wait for its initial data load.
Creator-reported · Project guideWhich devices and browsers work?
The creator lists desktop Firefox, Chrome, Safari and Edge with WebAssembly, WebGL and IndexedDB. Mobile can run the engine but lacks playable touch input.
Creator-reported · Project guideWhat are the controls?
Right-click switches cursor/mouselook, Tab enters combat, Ctrl enters magic mode and Home opens the menu.
Creator-reported · Project guideWhat is included in this version?
The hosted route downloads the Arx Fatalis demo, approximately 150 MB, and caches it in IndexedDB. It does not include the retail adventure.
Creator-reported · Project guideHow do saves work?
Saves stay in local browser storage. Private browsing and some storage configurations may prevent persistence.
Creator-reported · Project guideWhat should I know before playing?
Experimental port with documented visual glitches. Saves live in browser storage.
Creator-reported · Project guide


