Unlimited P.R.L 412 (Parasit Removal Laser)
To unlock the P. R . L 412 beat the game on professional mode.

Unlimted Hand Cannon
Beat the game with Leon 4 times and with Ada 3 times.

Unlock The Chicago Typewriter For Ada In Seprate Ways
To unlock the Chicago Typewriter for Ada in Separate Ways you have to beat it once then it will be availible ant the merchant for 300, 000 ptas.