Looking for a few people to do this achievment with.. It's the only dam' achievement I don't have. The one where u have to finish mission 4 on heroic without any of the marines dying.
It's impossible on single player because there is one part where you have about 5 marines and they all run out into the fight in different directions. I tried with my son once.. Whenever a marine would die, we would just revert to last save, BUT in the area where you have to wait for Cortana to open the door and you are fighting all the Promethians, as soon as Cortana opened the door and it saved, we noticed a dead marine on the ground... AAAGGGGHHHHH ! . . It's definitly a 3 or 4 person job.. Anyone want to join ? Save some lives..... Think of the children.. These Marines have to get back to their families & it's up to us to help them.