On the second player controller at the menu screen input up,up,down,down,L1,R1,L2,R2,L3,R3
On your first weapon press square and hold it then let go it should shoot out a big bomb and it will shoot little shots. gun 2 this time you'll do the same thing but it will shoot a giant ray of fire. gun 3 you'll do the same thing as i+ 2 but it will blow out tiny bombs
Beat the game with normal difficulty and a B rank or better to get the Theatre Option, Level 5 in training mode & Database Option
Beat the game with a A rank and unlock training level 6 and a new ending sequence
Beat level 6 with a A rank to unlock level 7 and level 6 under training mode
Return - Clear game with rank "A".
Gallery - Clear game with rank "A".
Database - Clear game with rank "B".
Theater - Clear game with rank "B".
Satellite - Clear game with rank "B".
99 Credits (continues)
Enter this during the start-up menu (the first menu which presents itself)- left, right, left, right, up, down, up, down, square, circle, square, circle, select, start- the square/ circle replaces the A/B buttons from the original NES Contra- the positioning of the button sequence is exactly the same as the NES controller- for those familiar with the original 99 lives code, you will not even have to look at the controller- unfortunately, the max lives shown on the screen after this code is only 8- when you run out of lives you must still continue at either the beginning or middle of the level you are playing depending on whether or not the midpoint has been passed.