Custom rules for Lt. Varras
So it's a rescue mission for the Space Marine player. Each player starts out with a 1' deployment zone on the short table edge.
Varras starts out inside a bunker just outside the enemy deployment zone. The bunker cannot be targeted, so essentially Varras is safe until the Space Marine player chooses for him to leave the bunker. Once he leaves the bunker he cannot re-enter the bunker. The fate of the mission hinges on whether or not the Space Marine player can safely guide Varras to his deployment zone table edge alive. If the enemy army successfully kills Varras, the mission is over and the Space Marine player loses.
I'm looking forward to trying out this mission and possibly tweaking some of the rules if it proves to be either too easy or too hard.