hold r (or z, I dunno, xbox 360) to lock onto crap
lock on + shoot will let you shoot
lock on + holding directions when you sword slice will let you do different moves
combos are timing based, so mashing y will give you one, then y, pause, y y will give you another one (actually I'm not 100% sure this is true in DMC1-- I haven't played that one nearly as much as 3 or 4)
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No problem!
This is a cute and pop genocide of love!