Tips on getting the Hard Badge : Well, this may be my first guide, so don't be upset with me... The best way I found to get the hard badge was to SAVE MY SPECIALS !
The one you will need the most later on is the Bullet-Time, so save it as much as possible...
BERSERK is CRUCIAL TOO !!! ONLY USE IT WHEN SHOOTING ENEMYS APPEAR !!! No matter how many non-shooting enemys appear, just use the berserk when a good deal of shooters appear too ! This may not be a "guide" so to speak, but it was the best way I found to get the badge... + it if you find it usefull !
This game is, at most, a good puzzle... The "RPG" title is offensive sometimes, giving that most of the time you got to WISH to be lucky enough to make a Skill to save your but... Alas, the Knight "Hero" is the WORST of the trio, and I say "Hero" because most of the time you gotta be crazy amout saving his sorry, pathetic, STAT BUGGED ASS !