I'm free Thursday if you want to try it out. It's like Warhammer: Charades...
The Endless Dance: If you are dancing while rolling the dice for the Masque’s attacks in the combat phase, you can reroll any failed hit rolls. If, at any point, you can …
On my table at the moment are: 5 Grey Knights, 6 Death Company, 8 mounted Undead archers, a Catachan infantry squad, a Warhammer Watchtower, a Leman Russ Vanquisher, and Doomrider! I wish I could finish something...
Games set during the Horus Heresy, courtesy of Forge World:
http://www.forgeworld.co.uk/The_Horus_Heresy
Lovely models, bit too costly for me though :-)
I imagine you could play a Heresy era game using the Chaos codex Si, just omitting anything Daemonic for the Imperials. It has Heresy era weapons and squad organisation