I just finished Mass Effect 3, though I didn't play the multiplayer and my war readiness was therefore at only 50%. So I didn't have enough war assets to get to the best ending.
I now want to play some multiplayer and get that war readiness to a good value, so that I can get the best ending with the same playthrough. I'm wondering now from which point on I need to replay to have my increased effective war asset score count.
At which point in the game is the ending you get determined? When are the war assets counted, the war readiness evaluated and the ending "locked"?
Best Answer
My understanding is that war assets and readiness (and hence EMS) are locked in after Priority: Cerberus Headquarters.
This is based on: