Microsoft and Bungie have yet to release any form of Halo demo before the release of the final game. Game Informer has posted a rumour claiming sources have revealed there will be a Halo 3 demo released over Xbox Live in the first half of 2007, and that we'll likely have to shell out to play it.
If true we'd bet our entire Halo knowledge on the fact that it would be something of a multiplayer demo (a couple of new maps and a few new weapons) rather than a portion of the single player game, which Bungie is famous for keeping under wraps right up until launch.
The burning question is, of course, would you pay for a demo? Haven't we all paid money for a demo we wanted on a magazine covermount before now? Let us know below.