» Mon May 21, 2012 8:31 am
You may, or may not, have noticed that the game actually plays a noticable sound effect when the "cleared" flag is set, so try listening out for that. Can't really describe the sound. Sort of like a sinister low, slow, booming sound.
How it's triggered seems to differ from my observations. Simply entering a particular room or area triggered it in some places, killing a boss did the trick in another, and opening the boss chest was the key in one dungeon. Avanchnzel didn't even get the flag for me, but I imagine that is because I did not enter a particular gated room near the end of the dungeon (as I don't know how to unlock the gate), and I either have the enter that area, kill all the enemies, or explore all areas of this dungeon in order for the game to mark it as "cleared".