Bloodborne’s control scheme was revealed in some footage of the demo from Festigames. You can read more about how the controls are mapped on the DualShock 4 below.
The left analog stick moves the character, and the right analog stick controls the camera. You can also press down on the right analog stick for the R3 button. Pressing R3 will reset the camera for you, unless an enemy is nearby, in which case it toggles lock-on to targets on and off.
The triangle button lets you use blood vials, which restore HP. If you have no blood vials on hand, this will be inactive.
The circle button activates backstep. If you are locked on to an enemy, you can use the left stick for your character to move in any direction. If you are not locked on, moving the left stick will make your character roll in that direction. If you hold down and the left stick, you basically do a sprint press after sprinting. You character will then do a sprint roll.
The L1 button is used to transform your right hand weapon, which will always be the transforming weapons.
The R1 button also transforms your right hand weapon, but in addition to that, if you press the R1 button and left analog stick forward, you will execute a kick attack.
The L2 button lets you attack with your left hand weapon, which can be either a torch or a gun. If you happen to be holding a two handed transforming weapon, it becomes the special attack button.
The R2 button allows you to release a strong attack from your transforming weapon. If you hold R2 down, you can charge that attack. If you move the left stick forward while pressing the R2 button, you will execute a jump attack.
You can watch footage of the game in action from Festigames below. Bloodborne will be released in 2015 for the PlayStation 4.