Insert your coins and enter the following codes using the gun triggers before Demonstration mode begins to unlock the corresponding effect.

Score display:
Press Left Gun Trigger(3), Right Gun Trigger(2), 'Start'. Player 1 as Sophie:
Press Right Gun Trigger, Left Gun Trigger, Right Gun Trigger(2), Left Gun Trigger(2), 'Start'.

Player 2 as Sophie:
Press Left Gun Trigger, Right Gun Trigger, Left Gun Trigger(2), Right Gun Trigger, Right Gun Trigger, 'Start'.

Players 1 and 2 as Sophie:
Press Left Gun Trigger, Right Gun Trigger(2), Left Gun Trigger(2), Right Gun Trigger, 'Start'.

Player 1 as Super G:
Press Left Gun Trigger(2), Right Gun Trigger, Left Gun Trigger(2), 'Start'.

Player two as Super G:
Press Right Gun Trigger(2), Left Gun Trigger, Right Gun Trigger(2), 'Start'.

Players 1 and 2 as Super G:
Press Left Gun Trigger, Right Gun Trigger, Left Gun Trigger, Right Gun Trigger, Left Gun Trigger, Right Gun Trigger, 'Start'.

Hidden Room:
To access the hidden room to collect the power-ups do not allow any civilians to be killed and after killing the giant bat before the final sequence shoot the switch to the right side of the door.

Unlock Bad Ending:
Complete the game with a score less than 62,000 points and with the last numeral as a zero.

Unlock Normal Ending:
Complete the game with a score less than 62,000 points and with the last numeral other than zero.

Unlock Good Ending:
Complete the game with a score more than 62,000 points.