OpenCE doesn't include any game data. You need a disc image of Halo: Combat Evolved for the original Xbox, as an .iso or .xiso file. Every version works.
PAL (European) maps were made for a slower console. The game adjusts them so they play like the NTSC maps, which means players of both versions can be in the same game.
On first start the game asks for the disc image, copies the maps folder out of it, and then starts. That's the whole setup.
Which build should I use?
| You want to | Use |
|---|---|
| Try it right now | The browser version. Nothing to install. |
| Play on a PC | The Windows or Linux release build |
| Play on a phone or tablet | The Android build |
| Report a bug | The debug build. It stops at the first failed check and writes it to the log. |
The game checks for new releases when it starts and asks before installing one.