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In the setup instructions, we are directed to place deep space counters within 7 hexes of the Home Player's system. Is that counted only from the home planet or all the counters in the system?
Do the AP's fleets ignore unrevealed deep space counters as in the original solitaire rules?
What happens to the AP's units when its home planet is destroyed by bombardment? Instructions for the Alien Player Co-op (2 Players) on page 16 says that all the AP's fleet units are completely eliminated from the game, so that is how I handled it in this scenario. Does this also include ground units sitting on a captured colony? Does that colony then revert back to my ownership? Or must I go in with ground troops to take it back, even after the AP is eliminated?
Thanks for any help with these questions; I apologize in advance if I missed something in the rules.
"Home system" refers to all counters of your colour, not just your home planet.
The rules for exploration technology in fleets only apply to Extermination and Exploration fleets (page 17 in CE scenario book), and the fleets in this scenario are specifically Regular fleets. Since they have no way of finding a safe path I'd say they should just ignore face down counters.
The scenario 4 draws most of it's rules from the original solo scenarios rather than from the co-op ones in the expansion, so I would apply the original rule that destroying (and now invading) the home planets leaves ships (and now ground troops) on the board and operational as before. See page 10 "Alien Payer Home Planet", 4th bullet, in the base game scenario book.