Ahriman's Prophecy

Experience Points:
After finishing the battle, quickly press Esc several times before watching
exp disappear. This can add points of exp you have achieved by killing
monster every time you access and exit inventoory (ESC twice).
It depends, of course, hand speed. This trick also works when
between the various monsters. Hit [Esc] really fast, and you see adding exp.
Oh, I almost forgot, you can only add experience points to reach a new level,
then you must kill a U.S.