Deep under the central desert of Kronus, a vast honeycomb of skull-lined tunnels and funereal chambers house the awakening mass of the Necron plague. Eons ago, these were the boulevards and squares of a great necropolis built to house the bones of the races who had fallen to the Necron purge, and ultimately for the Necron themselves to retire to. Over the millions of years, sand and rock had covered it all until ill-fated excavations awoke the deathless again. Play any of seven races, striving for control over Kronus. Take other races' strongholds by winning challenging battles on various maps individually associated with the respective Strongholds.

• New playable races, each with individual features
• Brand new Single Player Campaign experience, playable by all seven races
• Non-linear game-play: conquer an entire planet in the way you choose
• Watch a unique, non-linear story unfold from your race's perspective
• Customise and manage a persistent army as you sweep across the planet
• Customise the appearance and abilities of your commander unit as he grows in power and influence
• Discover the dark secrets of a planet shrouded in mystery.

Lost amongst the ruins of a leveled city lies an Emperor Class Titan, a war vessel of untold power forged in the planet-wide furnaces of Mars, and revered by billions as the epitome of Imperial dominance. The one who controls it will command the power to destroy, or defend, a world. The Imperials will summon it to overcome great evil, Chaos will corrupt it for their own designs, Orks will destroy it in their bloodlust and Eldar will disregard it in their arrogance. The expansion pack to the award winning Warhammer 40,000: Dawn of War will build upon the most exciting, visceral, front-line battlefield ever seen in an RTS game. Winter Assault promises to be one of the biggest expansion packs ever.

• First RTS expansion to add a completely unique, fully realized new race - The Imperial Guard
• New units for all existing races
• Brand new single player experience featuring 2 campaigns
• More animations and sync kills
• Fight in cold, harsh winter environments as well as unique SP maps
• Advanced online experience including observer mode, arranged team play and improved automatch. In Supreme Commander, there are no limits to the strategic possibilities.