The Ditman glitch is a fun glitch to use but if used the wrong way it can make the game crash.The weapon you need is the Striker which is 43,000 PTA's @ the merchant's.To activate the glitch,equip your striker.Tap the button for aiming the weapon.before the laser even comes out,tap the status button for the weapon inventory.equip any weapon besides the Striker.now try running.it should make things easier since it makes Leon do stuff faster (Actions,Shooting,etc.)if used after the Del Lago fight at the merchant's on the blue torches part...stand at the dock and activate the Ditman glitch.move the crates and go upstairs.now jump down and you will be walking wherever you please.(don't try to get out of the area(black space)because the game may crash)there should be some items underneath Leon if you go to the left side of the merchant.there's Ada's Shotgun on PC,Shotgun on PS2 and Homing Darts on GC.but once you grab Ada's shotgun,discard because if you try to sell it to the Merchant,the game will freeze.get the rest of the items and get in the boat.There are some videos on youtube showing how to do the Ditman glitch and where to use it.hope I helped!
When you complete the Separate Ways mini-game Ashley's knight costume and Leon's gangster costume will become available. Ashley's suit of armour is bullet and damage proof and she cannot be hurt by anything. The armour is so heavy Ashley cannot be carried away when she is wearing it. When you pick her up in the armour you do not have to worry about giving her First Aid Sprays, Herbs, or shooting Ganados.
On Professional difficulty clear Leon's Story to unlock the PRL 412 weapon. It has two settings (stun and kill) which you activate by holding or tapping the fire button. It also has infinite ammunition.