A new Halo Wars addon has been announced on xbox.com. Microsoft and Robot Entertainment have announced that it will be available on July 21 for 800 MS Points in all Xbox LIVE® enabled regions. The pack includes 4 new skirmish maps and 4 new achievements. Halo Wars continues to be the bestselling RTS game on any next generation console.
- Barrens: Difficult terrain channels units into killing zones. The side that controls the Forerunner artifacts will have the advantage (1v1 Map).
- Blood River: Secure base locations on nearby cliffs overlook this naturally red-tinged river. The soldiers that fought over its two narrow crossings gave the river its name, which has since taken on a greater meaning (1v1 Map).
- Glacial Ravine: A snow-topped mountain range forms a natural barrier that cuts this region in half. Control of the two energy walls at the narrow central pass often determines the outcome of the battle, though clever use of the Sentinel Factories may play a role as well (3v3 Map).
- Memorial Basin: The high ground in the middle offers good cover for infantry, while the generally open terrain transforms organized battle plans into bloodbaths (2v2 Map).


