The Martian schism, Scenario 1

Agents within the Mechanicum gazed out into the maelstrom of war the Imperium of Man was descending into.  Guilliman had largely seized the Ultima Segmentum, and rumour had it that a great battle at Isstvan III saw the Warmaster declare his Secession from the Imperium of Man.  Within what remained of the Emperor's realm those Legions still loyal to the Emperor fought one another, much as the Mechanicum itself was warring internally.  These agents, the self styled Coniugatorii, sought a reunified Mars, independent of the rule of Terra or Macragge.  A meeting was to take place between prominent members of the Dark and Sundered Mechanicum to see if an accord could be made.
Keeping such an event from the eyes and ears of the likes of the Thousand Sons and Alpha Legion was virtually impossible, almost guaranteeing their involvement.  Suspecting treachery, the Sundered Mechanicum sought reinforcement from their allies the Iron Warriors and the scions of Guilliman.
Now the stage was set before all hell broke lose on Mars. 

Players:
The players that are needed for this scenario are:
1 Dark Mechanicum player
1 Sundered Mechanicum player
2-4 players from the following legions (if 3 or 4 players are present then they split their side's points):
-Scions of Guilliman
-Iron Warriors
-Thousand Sons
-Alpha Legion

Armies:
Players may choose to use an Unbound army or use any of the Age of Darkness Force Organisation Charts.  If a player wishes to use a Rite of War they must use the Age of Darkness Force Org. Chart.
Armies are chosen to an agreed upon size (2,000pts is recommended) with the following exceptions:
-No players may take fortifications
-The Mechanicum players' warlord(s) cannot be Lords of War .
-No Primarchs may be taken.

Deployment:
Sundered and Dark Mechanicum: Must deploy first placing their Warlord and 1 Troops unit within 12" of the centre of the table and not within 2" of an enemy model.  All remaining forces must be placed in reserve.
Mechanicum players pick a long table edge, from which their reserves will enter and  towards which fleeing units will move.
Legion Forces:  Each Legion player picks a short table edge and deploys within 12" of that edge. 

Mission Special Rules: 
Dark Mechanicum units are all Stubborn.  If a Sundered Mechanicum unit attacks a Dark Mechanicum unit, all Dark Mechanicum units will lose Stubborn but gain Hatred: Sundered Mechanicum.
Dark Mechanicum units may leave the table from their own table edge or a Imperialist table edge.  Units may not leave in the same turn they arrive from reserve. 

Sundered Mechanicum units are all Stubborn.  If a Dark Mechanicum unit attacks a Sundered Mechanicum unit, all all Sundered Mechanicum units will lose Stubborn but gain Hatred: Dark Mechanicum
Sundered Mechanicum units may leave the table from their own table edge or a Imperialist table edge.
Units may not leave in the same turn they arrive from reserve.

Night Fight is in effect for the first turn.

Victory Conditions
Primary
Dark Mecanicum:
-2VP for each unit alive in the Mechanicum deployment zone at the end of the game.
-1VP for each unit that moves off the Dark Mechanicum or Imperialist table egdes.
Sundered Mechanicum:
-2VP for each unit alive in the Mechanicum deployment zone at the end of the game.
-1VP for each unit that moves off the Sundered Mechanicum or Secessionist table egdes.
Imperialists: 
-1 VP for each Sundered Mechanicum unit killed
-1 VP for each Secessionist units killed.
-1 VP for each Dark Mechanicum unit that moves off the Imperialist table egde
Secessionists:
-1 VP for each Dark Mechanicum unit killed
-1 VP for each Imperialist units killed.
-1 VP for each Sundered Mechanicum unit that moves off the Imperialist table egde

 Secondary
Slay the warlord: each Legion warlord is worth 1VP.  Each Mechanicum Warlord is worth 3 VP