Board Thread:General Discussion/@comment-1913529-20160306153022/@comment-25045164-20160309031733

The "leftover" bug happened in Moscow before as well. You get S rank once the enemy is dropped to just a few units remaining. That map was fixed later.

It's possible that the system picks wrong conditions to calculate the total score requirement. I've seen some folks S ranking Avalon even though their total score was less than my room's A rank score.