[quote name='Ryuukishi']I heard that game was really tough, and it was possible to get yourself into unwinnable scenarios based on what you had done like three maps ago. Didn't sound like my kind of game. :/[/QUOTE]
I read something about there being a gauge that is filled up based on the amount of damage you do (and maybe other things), and if you fill that gauge up, you get better spoils at the end of the map. Apparently as long as you keep filling those up, the game is easy (and the weapons you get for filling them up makes filling the next one up easier), but if you don't fill them up, the game gets borderline impossible.