I'm trying to play the HTML5 game Antumbra offline, but I'm running into issues. After downloading the game files, I get an error saying, "Exported games won't work until you upload them. Browsers block many features when running on the file:// protocol for security reasons." This leads to a black screen when I try to load it. I've experimented with NW.js but still encounter the same error. I'm looking for guidance on how to make this game playable offline. Any help with converting it into a standalone offline game, possibly as an .exe, would be greatly appreciated! Check out the game here: https://vilehead.itch.io/antumbra
2 Answers
The error you're experiencing usually happens because the game isn't designed to run from the file:// protocol. HTML5 games generally need to be served through a local server to function correctly. Try running it with a simple local server first to see if that resolves the issue. Once you get that working, you can think about packaging it as a standalone app later.
If you want a direct .exe file without any hassle, using Electron is a great choice. It packages your game into a desktop application. First, you'll need to install Node.js, then initialize your game folder using `npm init`. Install Electron, and create a main.js file that opens a BrowserWindow pointing to your game's index.html. Running `npm start` should launch the game like a desktop app, and `electron-builder` can package it into an executable. Just keep in mind that the game shouldn't try to access files outside its own folder.
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