It was revealed today at MacWorld that Bungie, the creators of the Marathon and Myth series, has been working on Halo- their upcoming product for both the Mac and the PC. What's Halo all about, you ask?

The player is a military recon unit of the human race's fledgling planetary empire. Pursued by alien warships to a massive and ancient ring construct deep in the void, the player must single-handedly improvise a guerilla war over land, sea and air, using the arsenals and vehicles of three distinct cultures. Using everything from composite swords to orbital bombardment, driving everything from giant tanks to agile combat aircraft, players wage intense warfare over and under the surface of this world.

The press release continues on about the Tribes-esque multiplayer. How does it look?

Screenshot

Like most Bungie games, the Halo engine shines with the highest-end realism technologies: real-time shadows, inverse kinematics, 3D positional and ambient sound effects, multipass texture mapping, scalable polygonal models, deformable terrain mesh. Enemy artificial intelligence operates simultaneously on both individual and squad levels, accounting for morale, with the result that no combat situation plays out the same way twice.

The boys in Blue report on location that the Windows version will not support OpenGL, but will be D3D-only. Also, ZDTV has posted Steve Jobs' keynote address from the MacWorld Expo (where the announcement was made). Skip about 41 mins ahead for the Bungie stuff. Also GameSpot has scored some more screenshots of the game in action.