Does anyone have any tips for No One Left Behind? I tried this with a friend last night, but the AI is awful. Both times the two of us were killing the enemies non stop but we kept losing the marines.
On our first attempt we were using ghosts circling around the main structure but we noticed the marines were following us and getting killed in the open.
So on our second attempt, we stayed inside the structure but were overwhelmed with elites and the few remaining marines were running around the top of the structure and were taken out when the phantoms showed up