Playable factions: Imperial Guard/Space Marines and Orks.
I'm positively out of control with buying Warhammer 40K games right now. This is one of the only games that feature a few Epic scale units, and I was curious. It's very dry, but seems to be a solid hex-based war game with W40K stuff.
I can't sleep, so instead I beat the first scenario 'Opening Faults' with The Imperium on Easy difficulty.
I beat the second scenario 'Perimeter Patrol' with The Imperium on Normal difficulty.