Order of War: Challenge announced

Peers!

Here's what I've found in the web on a gaming site:
Order of War: Challenge Stand-alone multiplayer add-on Announced

London (02nd February 2010) – Wargaming.net, a strategy game specialist, announces ORDER OF WAR: CHALLENGE, a new stand-alone add-on for its widely acclaimed World War II Real-Time Strategy game ORDER OF WAR™. This multiplayer add-on is currently in development for Windows PC and will be exclusively available on Steam®. Those players, who own the original version of ORDER OF WAR™, will get ORDER OF WAR: CHALLENGE automatically for FREE.

ORDER OF WAR: CHALLENGE is a multiplayer stand-alone add-on for ORDER OF WAR™, packing even more intense World War II real-time strategy action. With 6 extended modes, 12 unique maps, and hundreds of units under player control ORDER OF WAR: CHALLENGE gives players a battlefield experience of epic scale. With a focus on fast-action gameplay, and featuring exclusive bonus content, ORDER OF WAR: CHALLENGE is the ultimate way to experience online RTS gaming. With a new advanced gameplay system and including fog of war, ORDER OF WAR: CHALLENGE redefines combat mechanics and gives players a tense battlefield experience with plenty of room for wide-ranging tactics.
Viktor Kislyi, executive officer of Wargaming.net says, “In ORDER OF WAR: CHALLENGE we’re offering players a myriad of rich content including more strategic options in multiplayer mode. Dynamic battlefield action and tense multiplayer experience are the main criteria we used to develop ORDER OF WAR: CHALLENGE. That is why we greatly enhanced the multiplayer options - to guarantee RTS fans realistic PvP warfare in ORDER OF WAR: CHALLENGE”.

The ORDER OF WAR: CHALLENGE add-on is distributed exclusively via Steam®.

For more information on ORDER OF WAR: CHALLENGE, please visit the official webpage at Order of war .

It looks like the developers are publishing just MP part... I've never heard of such an experience... what do you think about it?