- Download the release zip for your system from the Downloads page and unzip it anywhere.
- Start the game:
halo.exeon Windows,./haloon Linux. - Pick your disc image in the file picker. If you'd rather skip the picker, put the
.isoor.xisonext to the executable and the game will find it. - The game extracts
mapsnext to the executable and starts.
On Linux without the desktop portal or zenity, the game can't show a file picker. It tells you to put the disc image next to the executable and stops, so do that and start it again.
Arch-based distributions can install the opence-bin package from the AUR instead.
Settings
Settings live in config.toml next to the game. Most of them are in the menus too, including FOV, anti-aliasing, frame rate limit and the high-res HUD.
Keep the maps folder Xbox-only
maps holds the Xbox maps from your disc. If you copy a Halo PC or Custom Edition maps folder over it, the game will say so and stop. Custom Edition maps go in their own folder: see the Custom Edition maps guide.